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<h1 id="edge-positioning">Edge positioning<a class="headerlink" href="#edge-positioning" title="Permanent link">&para;</a></h1>
<p>This page explains how to use Edge Positioning module in your bot in order to enter into a trade only if the trade has a reasonable win rate and risk reward ratio, and consequently adjust your position size and stoploss.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Edge positioning is not compatible with dynamic (volume-based) whitelist.</p>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Edge does not consider anything other than <em>its own</em> buy/sell/stoploss signals. It ignores the stoploss, trailing stoploss, and ROI settings in the strategy configuration file.
Therefore, it is important to understand that Edge can improve the performance of some trading strategies but <em>decrease</em> the performance of others.</p>
</div>
<h2 id="introduction">Introduction<a class="headerlink" href="#introduction" title="Permanent link">&para;</a></h2>
<p>Trading is all about probability. No one can claim that he has a strategy working all the time. You have to assume that sometimes you lose.</p>
<p>But it doesn't mean there is no rule, it only means rules should work "most of the time". Let's play a game: we toss a coin, heads: I give you 10<span class="arithmatex"><span class="MathJax_Preview">, tails: you give me 10</span><script type="math/tex">, tails: you give me 10</script></span>. Is it an interesting game? No, it's quite boring, isn't it?</p>
<p>But let's say the probability that we have heads is 80% (because our coin has the displaced distribution of mass or other defect), and the probability that we have tails is 20%. Now it is becoming interesting...</p>
<p>That means 10$ X 80% versus 10$ X 20%. 8$ versus 2<span class="arithmatex"><span class="MathJax_Preview">. That means over time you will win 8</span><script type="math/tex">. That means over time you will win 8</script></span> risking only 2$ on each toss of coin.</p>
<p>Let's complicate it more: you win 80% of the time but only 2<span class="arithmatex"><span class="MathJax_Preview">, I win 20% of the time but 8</span><script type="math/tex">, I win 20% of the time but 8</script></span>. The calculation is: 80% X 2$ versus 20% X 8<span class="arithmatex"><span class="MathJax_Preview">. It is becoming boring again because overtime you win <span class="arithmatex"><span class="MathJax_Preview">1.6</span><script type="math/tex">1.6</script></span> (80% X 2 (80% X 2</span><script type="math/tex">. It is becoming boring again because overtime you win <span class="arithmatex"><span class="MathJax_Preview">1.6</span><script type="math/tex">1.6</script></span> (80% X 2 (80% X 2</script></span>) and me <span class="arithmatex"><span class="MathJax_Preview">1.6 (20% X 8</span><script type="math/tex">1.6 (20% X 8</script></span>) too.</p>
<p>The question is: How do you calculate that? How do you know if you wanna play?</p>
<p>The answer comes to two factors:</p>
<ul>
<li>Win Rate</li>
<li>Risk Reward Ratio</li>
</ul>
<h3 id="win-rate">Win Rate<a class="headerlink" href="#win-rate" title="Permanent link">&para;</a></h3>
<p>Win Rate (<em>W</em>) is is the mean over some amount of trades (<em>N</em>) what is the percentage of winning trades to total number of trades (note that we don't consider how much you gained but only if you won or not).</p>
<div class="highlight"><pre><span></span><code>W = (Number of winning trades) / (Total number of trades) = (Number of winning trades) / N
</code></pre></div>
<p>Complementary Loss Rate (<em>L</em>) is defined as</p>
<div class="highlight"><pre><span></span><code>L = (Number of losing trades) / (Total number of trades) = (Number of losing trades) / N
</code></pre></div>
<p>or, which is the same, as</p>
<div class="highlight"><pre><span></span><code>L = 1 – W
</code></pre></div>
<h3 id="risk-reward-ratio">Risk Reward Ratio<a class="headerlink" href="#risk-reward-ratio" title="Permanent link">&para;</a></h3>
<p>Risk Reward Ratio (<em>R</em>) is a formula used to measure the expected gains of a given investment against the risk of loss. It is basically what you potentially win divided by what you potentially lose:</p>
<div class="highlight"><pre><span></span><code>R = Profit / Loss
</code></pre></div>
<p>Over time, on many trades, you can calculate your risk reward by dividing your average profit on winning trades by your average loss on losing trades:</p>
<div class="highlight"><pre><span></span><code>Average profit = (Sum of profits) / (Number of winning trades)
Average loss = (Sum of losses) / (Number of losing trades)
R = (Average profit) / (Average loss)
</code></pre></div>
<h3 id="expectancy">Expectancy<a class="headerlink" href="#expectancy" title="Permanent link">&para;</a></h3>
<p>At this point we can combine <em>W</em> and <em>R</em> to create an expectancy ratio. This is a simple process of multiplying the risk reward ratio by the percentage of winning trades and subtracting the percentage of losing trades, which is calculated as follows:</p>
<div class="highlight"><pre><span></span><code>Expectancy Ratio = (Risk Reward Ratio X Win Rate) – Loss Rate = (R X W) – L
</code></pre></div>
<p>So lets say your Win rate is 28% and your Risk Reward Ratio is 5:</p>
<div class="highlight"><pre><span></span><code>Expectancy = (5 X 0.28) – 0.72 = 0.68
</code></pre></div>
<p>Superficially, this means that on average you expect this strategy’s trades to return 1.68 times the size of your loses. Said another way, you can expect to win $1.68 for every $1 you lose. This is important for two reasons: First, it may seem obvious, but you know right away that you have a positive return. Second, you now have a number you can compare to other candidate systems to make decisions about which ones you employ.</p>
<p>It is important to remember that any system with an expectancy greater than 0 is profitable using past data. The key is finding one that will be profitable in the future.</p>
<p>You can also use this value to evaluate the effectiveness of modifications to this system.</p>
<p><strong>NOTICE:</strong> It's important to keep in mind that Edge is testing your expectancy using historical data, there's no guarantee that you will have a similar edge in the future. It's still vital to do this testing in order to build confidence in your methodology, but be wary of "curve-fitting" your approach to the historical data as things are unlikely to play out the exact same way for future trades.</p>
<h2 id="how-does-it-work">How does it work?<a class="headerlink" href="#how-does-it-work" title="Permanent link">&para;</a></h2>
<p>Edge combines dynamic stoploss, dynamic positions, and whitelist generation into one isolated module which is then applied to the trading strategy. If enabled in config, Edge will go through historical data with a range of stoplosses in order to find buy and sell/stoploss signals. It then calculates win rate and expectancy over <em>N</em> trades for each stoploss. Here is an example:</p>
<table>
<thead>
<tr>
<th>Pair</th>
<th style="text-align: center;">Stoploss</th>
<th style="text-align: right;">Win Rate</th>
<th style="text-align: right;">Risk Reward Ratio</th>
<th style="text-align: right;">Expectancy</th>
</tr>
</thead>
<tbody>
<tr>
<td>XZC/ETH</td>
<td style="text-align: center;">-0.01</td>
<td style="text-align: right;">0.50</td>
<td style="text-align: right;">1.176384</td>
<td style="text-align: right;">0.088</td>
</tr>
<tr>
<td>XZC/ETH</td>
<td style="text-align: center;">-0.02</td>
<td style="text-align: right;">0.51</td>
<td style="text-align: right;">1.115941</td>
<td style="text-align: right;">0.079</td>
</tr>
<tr>
<td>XZC/ETH</td>
<td style="text-align: center;">-0.03</td>
<td style="text-align: right;">0.52</td>
<td style="text-align: right;">1.359670</td>
<td style="text-align: right;">0.228</td>
</tr>
<tr>
<td>XZC/ETH</td>
<td style="text-align: center;">-0.04</td>
<td style="text-align: right;">0.51</td>
<td style="text-align: right;">1.234539</td>
<td style="text-align: right;">0.117</td>
</tr>
</tbody>
</table>
<p>The goal here is to find the best stoploss for the strategy in order to have the maximum expectancy. In the above example stoploss at 3% leads to the maximum expectancy according to historical data.</p>
<p>Edge module then forces stoploss value it evaluated to your strategy dynamically.</p>
<h3 id="position-size">Position size<a class="headerlink" href="#position-size" title="Permanent link">&para;</a></h3>
<p>Edge also dictates the stake amount for each trade to the bot according to the following factors:</p>
<ul>
<li>Allowed capital at risk</li>
<li>Stoploss</li>
</ul>
<p>Allowed capital at risk is calculated as follows:</p>
<div class="highlight"><pre><span></span><code>Allowed capital at risk = (Capital available_percentage) X (Allowed risk per trade)
</code></pre></div>
<p>Stoploss is calculated as described above against historical data.</p>
<p>Your position size then will be:</p>
<div class="highlight"><pre><span></span><code>Position size = (Allowed capital at risk) / Stoploss
</code></pre></div>
<p>Example:</p>
<p>Let's say the stake currency is ETH and you have 10 ETH on the exchange, your capital available percentage is 50% and you would allow 1% of risk for each trade. thus your available capital for trading is <strong>10 x 0.5 = 5 ETH</strong> and allowed capital at risk would be <strong>5 x 0.01 = 0.05 ETH</strong>.</p>
<p>Let's assume Edge has calculated that for <strong>XLM/ETH</strong> market your stoploss should be at 2%. So your position size will be <strong>0.05 / 0.02 = 2.5 ETH</strong>.</p>
<p>Bot takes a position of 2.5 ETH on XLM/ETH (call it trade 1). Up next, you receive another buy signal while trade 1 is still open. This time on <strong>BTC/ETH</strong> market. Edge calculated stoploss for this market at 4%. So your position size would be 0.05 / 0.04 = 1.25 ETH (call it trade 2).</p>
<p>Note that available capital for trading didn’t change for trade 2 even if you had already trade 1. The available capital doesn’t mean the free amount on your wallet.</p>
<p>Now you have two trades open. The bot receives yet another buy signal for another market: <strong>ADA/ETH</strong>. This time the stoploss is calculated at 1%. So your position size is <strong>0.05 / 0.01 = 5 ETH</strong>. But there are already 3.75 ETH blocked in two previous trades. So the position size for this third trade would be <strong>5 – 3.75 = 1.25 ETH</strong>.</p>
<p>Available capital doesn’t change before a position is sold. Let’s assume that trade 1 receives a sell signal and it is sold with a profit of 1 ETH. Your total capital on exchange would be 11 ETH and the available capital for trading becomes 5.5 ETH.</p>
<p>So the Bot receives another buy signal for trade 4 with a stoploss at 2% then your position size would be <strong>0.055 / 0.02 = 2.75 ETH</strong>.</p>
<h2 id="configurations">Configurations<a class="headerlink" href="#configurations" title="Permanent link">&para;</a></h2>
<p>Edge module has following configuration options:</p>
<table>
<thead>
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>enabled</code></td>
<td>If true, then Edge will run periodically. <br><em>Defaults to <code>false</code>.</em> <br> <strong>Datatype:</strong> Boolean</td>
</tr>
<tr>
<td><code>process_throttle_secs</code></td>
<td>How often should Edge run in seconds. <br><em>Defaults to <code>3600</code> (once per hour).</em> <br> <strong>Datatype:</strong> Integer</td>
</tr>
<tr>
<td><code>calculate_since_number_of_days</code></td>
<td>Number of days of data against which Edge calculates Win Rate, Risk Reward and Expectancy. <br> <strong>Note</strong> that it downloads historical data so increasing this number would lead to slowing down the bot. <br><em>Defaults to <code>7</code>.</em> <br> <strong>Datatype:</strong> Integer</td>
</tr>
<tr>
<td><code>allowed_risk</code></td>
<td>Ratio of allowed risk per trade. <br><em>Defaults to <code>0.01</code> (1%)).</em> <br> <strong>Datatype:</strong> Float</td>
</tr>
<tr>
<td><code>stoploss_range_min</code></td>
<td>Minimum stoploss. <br><em>Defaults to <code>-0.01</code>.</em> <br> <strong>Datatype:</strong> Float</td>
</tr>
<tr>
<td><code>stoploss_range_max</code></td>
<td>Maximum stoploss. <br><em>Defaults to <code>-0.10</code>.</em> <br> <strong>Datatype:</strong> Float</td>
</tr>
<tr>
<td><code>stoploss_range_step</code></td>
<td>As an example if this is set to -0.01 then Edge will test the strategy for <code>[-0.01, -0,02, -0,03 ..., -0.09, -0.10]</code> ranges. <br> <strong>Note</strong> than having a smaller step means having a bigger range which could lead to slow calculation. <br> If you set this parameter to -0.001, you then slow down the Edge calculation by a factor of 10. <br><em>Defaults to <code>-0.001</code>.</em> <br> <strong>Datatype:</strong> Float</td>
</tr>
<tr>
<td><code>minimum_winrate</code></td>
<td>It filters out pairs which don't have at least minimum_winrate. <br>This comes handy if you want to be conservative and don't comprise win rate in favour of risk reward ratio. <br><em>Defaults to <code>0.60</code>.</em> <br> <strong>Datatype:</strong> Float</td>
</tr>
<tr>
<td><code>minimum_expectancy</code></td>
<td>It filters out pairs which have the expectancy lower than this number. <br>Having an expectancy of 0.20 means if you put 10$ on a trade you expect a 12$ return. <br><em>Defaults to <code>0.20</code>.</em> <br> <strong>Datatype:</strong> Float</td>
</tr>
<tr>
<td><code>min_trade_number</code></td>
<td>When calculating <em>W</em>, <em>R</em> and <em>E</em> (expectancy) against historical data, you always want to have a minimum number of trades. The more this number is the more Edge is reliable. <br>Having a win rate of 100% on a single trade doesn't mean anything at all. But having a win rate of 70% over past 100 trades means clearly something. <br><em>Defaults to <code>10</code> (it is highly recommended not to decrease this number).</em> <br> <strong>Datatype:</strong> Integer</td>
</tr>
<tr>
<td><code>max_trade_duration_minute</code></td>
<td>Edge will filter out trades with long duration. If a trade is profitable after 1 month, it is hard to evaluate the strategy based on it. But if most of trades are profitable and they have maximum duration of 30 minutes, then it is clearly a good sign.<br><strong>NOTICE:</strong> While configuring this value, you should take into consideration your timeframe. As an example filtering out trades having duration less than one day for a strategy which has 4h interval does not make sense. Default value is set assuming your strategy interval is relatively small (1m or 5m, etc.).<br><em>Defaults to <code>1440</code> (one day).</em> <br> <strong>Datatype:</strong> Integer</td>
</tr>
<tr>
<td><code>remove_pumps</code></td>
<td>Edge will remove sudden pumps in a given market while going through historical data. However, given that pumps happen very often in crypto markets, we recommend you keep this off.<br><em>Defaults to <code>false</code>.</em> <br> <strong>Datatype:</strong> Boolean</td>
</tr>
</tbody>
</table>
<h2 id="running-edge-independently">Running Edge independently<a class="headerlink" href="#running-edge-independently" title="Permanent link">&para;</a></h2>
<p>You can run Edge independently in order to see in details the result. Here is an example:</p>
<div class="highlight"><pre><span></span><code>freqtrade<span class="w"> </span>edge
</code></pre></div>
<p>An example of its output:</p>
<table>
<thead>
<tr>
<th style="text-align: left;">pair</th>
<th style="text-align: right;">stoploss</th>
<th style="text-align: right;">win rate</th>
<th style="text-align: right;">risk reward ratio</th>
<th style="text-align: right;">required risk reward</th>
<th style="text-align: right;">expectancy</th>
<th style="text-align: right;">total number of trades</th>
<th style="text-align: right;">average duration (min)</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left;">AGI/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.64</td>
<td style="text-align: right;">5.86</td>
<td style="text-align: right;">0.56</td>
<td style="text-align: right;">3.41</td>
<td style="text-align: right;">14</td>
<td style="text-align: right;">54</td>
</tr>
<tr>
<td style="text-align: left;">NXS/BTC</td>
<td style="text-align: right;">-0.03</td>
<td style="text-align: right;">0.64</td>
<td style="text-align: right;">2.99</td>
<td style="text-align: right;">0.57</td>
<td style="text-align: right;">1.54</td>
<td style="text-align: right;">11</td>
<td style="text-align: right;">26</td>
</tr>
<tr>
<td style="text-align: left;">LEND/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.82</td>
<td style="text-align: right;">2.05</td>
<td style="text-align: right;">0.22</td>
<td style="text-align: right;">1.50</td>
<td style="text-align: right;">11</td>
<td style="text-align: right;">36</td>
</tr>
<tr>
<td style="text-align: left;">VIA/BTC</td>
<td style="text-align: right;">-0.01</td>
<td style="text-align: right;">0.55</td>
<td style="text-align: right;">3.01</td>
<td style="text-align: right;">0.83</td>
<td style="text-align: right;">1.19</td>
<td style="text-align: right;">11</td>
<td style="text-align: right;">48</td>
</tr>
<tr>
<td style="text-align: left;">MTH/BTC</td>
<td style="text-align: right;">-0.09</td>
<td style="text-align: right;">0.56</td>
<td style="text-align: right;">2.82</td>
<td style="text-align: right;">0.80</td>
<td style="text-align: right;">1.12</td>
<td style="text-align: right;">18</td>
<td style="text-align: right;">52</td>
</tr>
<tr>
<td style="text-align: left;">ARDR/BTC</td>
<td style="text-align: right;">-0.04</td>
<td style="text-align: right;">0.42</td>
<td style="text-align: right;">3.14</td>
<td style="text-align: right;">1.40</td>
<td style="text-align: right;">0.73</td>
<td style="text-align: right;">12</td>
<td style="text-align: right;">42</td>
</tr>
<tr>
<td style="text-align: left;">BCPT/BTC</td>
<td style="text-align: right;">-0.01</td>
<td style="text-align: right;">0.71</td>
<td style="text-align: right;">1.34</td>
<td style="text-align: right;">0.40</td>
<td style="text-align: right;">0.67</td>
<td style="text-align: right;">14</td>
<td style="text-align: right;">30</td>
</tr>
<tr>
<td style="text-align: left;">WINGS/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.56</td>
<td style="text-align: right;">1.97</td>
<td style="text-align: right;">0.80</td>
<td style="text-align: right;">0.65</td>
<td style="text-align: right;">27</td>
<td style="text-align: right;">42</td>
</tr>
<tr>
<td style="text-align: left;">VIBE/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.83</td>
<td style="text-align: right;">0.91</td>
<td style="text-align: right;">0.20</td>
<td style="text-align: right;">0.59</td>
<td style="text-align: right;">12</td>
<td style="text-align: right;">35</td>
</tr>
<tr>
<td style="text-align: left;">MCO/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.79</td>
<td style="text-align: right;">0.97</td>
<td style="text-align: right;">0.27</td>
<td style="text-align: right;">0.55</td>
<td style="text-align: right;">14</td>
<td style="text-align: right;">31</td>
</tr>
<tr>
<td style="text-align: left;">GNT/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.50</td>
<td style="text-align: right;">2.06</td>
<td style="text-align: right;">1.00</td>
<td style="text-align: right;">0.53</td>
<td style="text-align: right;">18</td>
<td style="text-align: right;">24</td>
</tr>
<tr>
<td style="text-align: left;">HOT/BTC</td>
<td style="text-align: right;">-0.01</td>
<td style="text-align: right;">0.17</td>
<td style="text-align: right;">7.72</td>
<td style="text-align: right;">4.81</td>
<td style="text-align: right;">0.50</td>
<td style="text-align: right;">209</td>
<td style="text-align: right;">7</td>
</tr>
<tr>
<td style="text-align: left;">SNM/BTC</td>
<td style="text-align: right;">-0.03</td>
<td style="text-align: right;">0.71</td>
<td style="text-align: right;">1.06</td>
<td style="text-align: right;">0.42</td>
<td style="text-align: right;">0.45</td>
<td style="text-align: right;">17</td>
<td style="text-align: right;">38</td>
</tr>
<tr>
<td style="text-align: left;">APPC/BTC</td>
<td style="text-align: right;">-0.02</td>
<td style="text-align: right;">0.44</td>
<td style="text-align: right;">2.28</td>
<td style="text-align: right;">1.27</td>
<td style="text-align: right;">0.44</td>
<td style="text-align: right;">25</td>
<td style="text-align: right;">43</td>
</tr>
<tr>
<td style="text-align: left;">NEBL/BTC</td>
<td style="text-align: right;">-0.03</td>
<td style="text-align: right;">0.63</td>
<td style="text-align: right;">1.29</td>
<td style="text-align: right;">0.58</td>
<td style="text-align: right;">0.44</td>
<td style="text-align: right;">19</td>
<td style="text-align: right;">59</td>
</tr>
</tbody>
</table>
<p>Edge produced the above table by comparing <code>calculate_since_number_of_days</code> to <code>minimum_expectancy</code> to find <code>min_trade_number</code> historical information based on the config file. The timerange Edge uses for its comparisons can be further limited by using the <code>--timerange</code> switch.</p>
<p>In live and dry-run modes, after the <code>process_throttle_secs</code> has passed, Edge will again process <code>calculate_since_number_of_days</code> against <code>minimum_expectancy</code> to find <code>min_trade_number</code>. If no <code>min_trade_number</code> is found, the bot will return "whitelist empty". Depending on the trade strategy being deployed, "whitelist empty" may be return much of the time - or <em>all</em> of the time. The use of Edge may also cause trading to occur in bursts, though this is rare.</p>
<p>If you encounter "whitelist empty" a lot, condsider tuning <code>calculate_since_number_of_days</code>, <code>minimum_expectancy</code> and <code>min_trade_number</code> to align to the trading frequency of your strategy.</p>
<h3 id="update-cached-pairs-with-the-latest-data">Update cached pairs with the latest data<a class="headerlink" href="#update-cached-pairs-with-the-latest-data" title="Permanent link">&para;</a></h3>
<p>Edge requires historic data the same way as backtesting does.
Please refer to the <a href="../data-download/">Data Downloading</a> section of the documentation for details.</p>
<h3 id="precising-stoploss-range">Precising stoploss range<a class="headerlink" href="#precising-stoploss-range" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code>freqtrade<span class="w"> </span>edge<span class="w"> </span>--stoplosses<span class="o">=</span>-0.01,-0.1,-0.001<span class="w"> </span><span class="c1">#min,max,step</span>
</code></pre></div>
<h3 id="advanced-use-of-timerange">Advanced use of timerange<a class="headerlink" href="#advanced-use-of-timerange" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code>freqtrade<span class="w"> </span>edge<span class="w"> </span>--timerange<span class="o">=</span><span class="m">20181110</span>-20181113
</code></pre></div>
<p>Doing <code>--timerange=-20190901</code> will get all available data until September 1<sup>st</sup> (excluding September 1<sup>st</sup> 2019).</p>
<p>The full timerange specification:</p>
<ul>
<li>Use tickframes till 2018/01/31: <code>--timerange=-20180131</code></li>
<li>Use tickframes since 2018/01/31: <code>--timerange=20180131-</code></li>
<li>Use tickframes since 2018/01/31 till 2018/03/01 : <code>--timerange=20180131-20180301</code></li>
<li>Use tickframes between POSIX timestamps 1527595200 1527618600: <code>--timerange=1527595200-1527618600</code></li>
</ul>
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