https://github.com/linksplatform/Bot/blob/1d1f213febb4d9aab73eb647e83b2ec8478fe29a/csharp/TraderBot/appsettings.json#L27 - remove this setting from config and calculate it automatically. For example, if we don't update this setting for too long we might get an error:  
Bot/csharp/TraderBot/appsettings.json
Line 27 in 1d1f213
For example, if we don't update this setting for too long we might get an error: