Add buy and sell fill notifications

closes #3542

docs/webhook-config.md

@@ -19,6 +19,11 @@ Sample configuration (tested using IFTTT).
             "value1": "Cancelling Open Buy Order for {pair}",
             "value2": "limit {limit:8f}",
             "value3": "{stake_amount:8f} {stake_currency}"
+        },
+         "webhookbuyfill": {
+            "value1": "Buy Order for {pair} filled",
+            "value2": "at {open_rate:8f}",
+            "value3": ""
         },
         "webhooksell": {
             "value1": "Selling {pair}",
@@ -30,6 +35,11 @@ Sample configuration (tested using IFTTT).
             "value2": "limit {limit:8f}",
             "value3": "profit: {profit_amount:8f} {stake_currency} ({profit_ratio})"
         },
+        "webhooksellfill": {
+            "value1": "Sell Order for {pair} filled",
+            "value2": "at {close_rate:8f}.",
+            "value3": ""
+        },
         "webhookstatus": {
             "value1": "Status: {status}",
             "value2": "",
@@ -91,6 +101,21 @@ Possible parameters are:
 * `order_type`
 * `current_rate`
 
+### Webhookbuyfill
+
+The fields in `webhook.webhookbuyfill` are filled when the bot filled a buy order. Parameters are filled using string.format.
+Possible parameters are:
+
+* `trade_id`
+* `exchange`
+* `pair`
+* `open_rate`
+* `amount`
+* `open_date`
+* `stake_amount`
+* `stake_currency`
+* `fiat_currency`
+
 ### Webhooksell
 
 The fields in `webhook.webhooksell` are filled when the bot sells a trade. Parameters are filled using string.format.
@@ -103,6 +128,27 @@ Possible parameters are:
 * `limit`
 * `amount`
 * `open_rate`
+* `profit_amount`
+* `profit_ratio`
+* `stake_currency`
+* `fiat_currency`
+* `sell_reason`
+* `order_type`
+* `open_date`
+* `close_date`
+
+### Webhooksellfill
+
+The fields in `webhook.webhooksellfill` are filled when the bot fills a sell order (closes a Trae). Parameters are filled using string.format.
+Possible parameters are:
+
+* `trade_id`
+* `exchange`
+* `pair`
+* `gain`
+* `close_rate`
+* `amount`
+* `open_rate`
 * `current_rate`
 * `profit_amount`
 * `profit_ratio`