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doc: add notification api usage

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c9s 2022-07-04 20:06:50 +08:00
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doc/topics/developing-strategy.md
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@ -341,8 +341,13 @@ session.UserDataStream.OnOrderUpdate(func(order types.Order) {
})
```
However, order update only contains the status of the order, if you need to get the details of the trade execution,
you need the trade update event:
However, order update only contains status, price, quantity of the order, if you're submitting market order, you won't know
the actual price of the order execution.
One order can be filled by different size trades from the market, by collecting the trades, you can calculate the
average price of the order execution and the total trading fee that you used for the order.
If you need to get the details of the trade execution. you need the trade update event:
```go
session.UserDataStream.OnTrade(func(trade types.Trade) {
@ -386,6 +391,17 @@ activeBook.Add(createdOrders...)
## Notification
You can use the notification API to send notification to Telegram or Slack:
```go
bbgo.Notify(message)
bbgo.Notify(message, objs...)
bbgo.Notify(format, arg1, arg2, arg3, objs...)
bbgo.Notify(object, object2, object3)
```
Note that, if you're using the third format, simple arguments (float, bool, string... etc) will be used for calling the
fmt.Sprintf, and the extra arguments will be rendered as attachments.
## Handling Trades and Profit