How to Modify and Close Open Positions from the MT5 (Android) Trading Screen
Tap "Trade" in the bottom menu to display your open positions and pending orders (new limit and stop orders).
From here, you can modify or close your open positions.
How to Modify Positions from the Trade Screen
Long press the position you want to modify in the "Trade" screen, then tap "Modify Position" from the displayed menu.
Enter the modification details (stop loss or take profit levels) on the order screen, and tap "Modify" to submit the changes.
How to Close Positions from the Trade Screen
Tap the position you want to close in the "Trade" screen, then select "Close Position" from the displayed menu.
On the order screen, tap the "Close by Loss (or Profit)" button at the desired time to place the closing order.
