Simple Tutorial: 15min

The first red circle is an ideal short entry point: OBV shows a clear turning point and changes from green to red (not because of the turning point but it becomes red). However, if you're not confident, enter short at the second red circle. At this point, the EMA has also turned red.

The green circle below is a short exit point.

It is still not confirmed to go long, the turning point in the green circle has not turned green, and the EMA is still dark red, with no color change. So it may just be a small rebound.