Calisteniapp

In a trellis type bars or vertical bar

Place one hand above your head, and the other at waist level.

Try to have the lower arm fully locked and supporting, while the upper arm is slightly bent

Look to open your legs and leave them in the air while you face the bars so that you can check what the grip would be like for a flag

If you're rocking to one side, shift your bottom arm placement to the left or right until you find your balance.