When you select a pair, the service automatically downloads data from the exchange's DOM(Depth of Market). However, while you are setting up the task, the ASK, BID and LAST data on the exchange can change. At the same time, the data in the personal account will not be updated.
Thus, after setting up and running the task, the purchase or sell will be made according to the latest data from the exchange. BUT, these data may differ from the data in your personal account.
If a trading pair is high volatile during the setting of the task, we recommend you to select the same pair again in the field "Pair" after setting all parameters. But you do not need to choose new exchange. The task settings will be saved, and the ASK, BID and LAST data will be updated.
In the near future, we implement dynamic data loading. Thus, during the setup you will see the actual data.