updates

docs/exchanges.md

@@ -64,6 +64,26 @@ Binance supports [time_in_force](configuration.md#understand-order_time_in_force
 For Binance, please add `"BNB/<STAKE>"` to your blacklist to avoid issues.
 Accounts having BNB accounts use this to pay for fees - if your first trade happens to be on `BNB`, further trades will consume this position and make the initial BNB trade unsellable as the expected amount is not there anymore.
 
+### Binance Futures' order pricing
+
+When trading on Binance Futures market. orderbook must be used because there is no price ticker data for futures.
+
+``` jsonc
+  "bid_strategy": {
+      "ask_last_balance": 0.0,
+      "use_order_book": true,
+      "order_book_top": 1,
+      "check_depth_of_market": {
+          "enabled": false,
+          "bids_to_ask_delta": 1
+      }
+  },
+  "ask_strategy": {
+      "use_order_book": true,
+      "order_book_top": 1
+  },
+```
+
 ### Binance sites
 
 Binance has been split into 2, and users must use the correct ccxt exchange ID for their exchange, otherwise API keys are not recognized.