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@ -388,48 +388,51 @@ The valid values are:
## Prices used for orders
Prices for regular orders can be controlled via the parameter structures `bid_strategy` for Buying, and `ask_strategy` for selling.
Prices are always retrieved right before an order is placed, either by querying the `fetch_ticker()` endpoint of the exchange (usually `/ticker`), or by using the orderbook.
Prices for regular orders can be controlled via the parameter structures `bid_strategy` for buying and `ask_strategy` for selling.
Prices are always retrieved right before an order is placed, either by querying the exchange tickers or by using the orderbook data.
!!! Note
Orderbook data used by Freqtrade are the data retrieved from exchange by the ccxt's function `fetch_order_book()`, i.e. are usually data from the L2-aggregated orderbook, while the ticker data are the structures returned by the ccxt's `fetch_ticker()`/`fetch_tickers()` functions. Refer to the ccxt library [documentation](https://github.com/ccxt/ccxt/wiki/Manual#market-data) for more details.
### Buy price
#### Check depth of market
When enabling `bid_strategy.check_depth_of_market.enabled=True`, then buy signals will be filtered based on the orderbook size for each size (sum of all amounts).
Orderbook bid size is then divided by Orderbook ask size - and the resulting delta is compared to `bid_strategy.check_depth_of_market.bids_to_ask_delta`, and a buy is only executed if the orderbook delta is bigger or equal to the configured delta.
When check depth of market is enabled (i.e. `bid_strategy.check_depth_of_market.enabled=True`), the buy signals are filtered based on the orderbook depth (sum of all amounts) for each orderbook side.
Orderbook `bid` (buy) side depth is then divided by the orderbook `ask` (sell) side depth and the resulting delta is compared to the value of the `bid_strategy.check_depth_of_market.bids_to_ask_delta` parameter. The buy order is only executed if the orderbook delta is greater than or equal to the configured delta value.
!!! Note
A calculated delta below 1 means that sell order size is greater, while value greater than 1 means buy order size is higher
A delta value below 1 means that `ask` (sell) orderbook side depth is greater than the depth of the `bid` (buy) orderbook side, while a value greater than 1 means opposite (depth of the buy side is higher than the depth of the sell side).
#### Buy price with Orderbook enabled
When buying with the orderbook enabled (`bid_strategy.use_order_book=True`) - Freqtrade will fetch the `bid_strategy.order_book_top` entries in the orderbook, and will then use the entry specified as `bid_strategy.order_book_top` on the `bids` side of the orderbook. 1 specifies the topmost entry in the Orderbook - while 2 would use the 2nd entry in the Orderbook.
When buying with the orderbook enabled (`bid_strategy.use_order_book=True`), Freqtrade fetches the `bid_strategy.order_book_top` entries from the orderbook and then uses the entry specified as `bid_strategy.order_book_top` on the `bid` (buy) side of the orderbook. 1 specifies the topmost entry in the orderbook, while 2 would use the 2nd entry in the orderbook, and so on.
#### Buy price without Orderbook
#### Buy price without Orderbook enabled
When not using orderbook (`bid_strategy.use_order_book=False`), then Freqtrade will use the best `ask` price based on a call to `fetch_ticker()` if it's below the `last` traded price.
Otherwise, it'll calculate a rate between `ask` and `last` price.
When not using orderbook (`bid_strategy.use_order_book=False`), Freqtrade uses the best `ask` (sell) price from the ticker if it's below the `last` traded price from the ticker. Otherwise (when the `ask` price is not below the `last` price), it calculates a rate between `ask` and `last` price.
The `bid_strategy.ask_last_balance` configuration parameter controls this. A value of `0.0` will use `ask` price, `1.0` will use the `last` price and values between those interpolate between ask and last
price.
Using `ask` price will guarantee quick success in bid, but bot will also end up paying more than what would have been necessary.
The `bid_strategy.ask_last_balance` configuration parameter controls this. A value of `0.0` will use `ask` price, while `1.0` will use the `last` price and values between those interpolate between ask and last price.
Using `ask` price often guarantees quicker success in the bid, but the bot can also end up paying more than what would have been necessary.
### Sell price
#### Sell price with Orderbook enabled
When selling with the Orderbook enabled (`ask_strategy.use_order_book=True`) - Freqtrade will fetch the `ask_strategy.order_book_max` entries in the orderbook. Freqtrade will then validate each of the orderbook steps between `ask_strategy.order_book_min` and `ask_strategy.order_book_max` on the `ask` side for a profitable sell-possibility based on the strategy configuration and will place a sell order at the first profitable spot.
When selling with the orderbook enabled (`ask_strategy.use_order_book=True`), Freqtrade fetches the `ask_strategy.order_book_max` entries in the orderbook. Then each of the orderbook steps between `ask_strategy.order_book_min` and `ask_strategy.order_book_max` on the `ask` orderbook side are validated for a profitable sell-possibility based on the strategy configuration and the sell order is placed at the first profitable spot.
The idea here is to place the sell order early, to be ahead in the queue.
The idea here is to place the sell-order early, to be ahead in the queue.
A fixed slot (mirroring `bid_strategy.order_book_top`) can be defined by setting `ask_strategy.order_book_min` and `ask_strategy.order_book_max` to the same number.
!!! Warning "Orderbook and stoploss_on_exchange"
Using `ask_strategy.order_book_max` higher than 1 may increase the risk, since an eventual [stoploss on exchange](#understand-order_types) will be need to be cancelled as soon as the order is placed.
Using `ask_strategy.order_book_max` higher than 1 may increase the risk, since an eventual [stoploss on exchange](#understand-order_types) will be needed to be cancelled as soon as the order is placed.
#### Sell price without Orderbook enabled
#### Sell price without orderbook
When not using orderbook (`ask_strategy.use_order_book=False`), then the best `bid` will be used as sell rate based on a call to `fetch_ticker()`.
When not using orderbook (`ask_strategy.use_order_book=False`), the `bid` price from the ticker will be used as the sell price.
## Pairlists