In the Market Execution mode, a trader agrees to execute a deal at the price offered by a broker.
Fill out the following fields in the order placing window:
A tap on "Sell by Market" or "Buy by Market" creates an order to a broker to execute a Sell or Buy deal respectively at the broker defined price.
If the "Execution" box is not active, then the option is disabled on the server.
In order to close the position you need to tap "Close position" in its context menu on the "Trade" tab.
Once you tap "Close by Market", the position will be completely closed.