Nitpicking documentation:

- Clarify order_types.stoploss_on_exchange
- Detail available_capital ammendments
- Clarify BNB fee reduction when BNB runs out on Binance
- Explain PrecisionFilter

docs/exchanges.md

@@ -68,6 +68,8 @@ Binance supports [time_in_force](configuration.md#understand-order_time_in_force
 For Binance, it is suggested to add `"BNB/<STAKE>"` to your blacklist to avoid issues, unless you are willing to maintain enough extra `BNB` on the account or unless you're willing to disable using `BNB` for fees.
 Binance accounts may use `BNB` for fees, and if a trade happens to be on `BNB`, further trades may consume this position and make the initial BNB trade unsellable as the expected amount is not there anymore.
 
+If not enough `BNB` is availavle to cover transaction fees, then fees will not be covered by `BNB` and no fee reduction will occur. Freqtrade will never buy BNB to cover for fees. BNB needs to be bought and monitored manually to this end.
+
 ### 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.