I think what's really being asked is ''how do you know when price is about to start chopping aorund?''. (answer: I don't know. I don't think anyone does)
I mean, you can identify chop in realtime with your eyes, and when you see that moves either way seem unsustainable and longs and shorts are all being stopped out and price isn't going anywhere.
The problem is that this information is inevitably too late to act upon.
Once you realise you are in 'chop', you've already been stopped out a few times.
Even worse, once you have identified 'chop' you decide to stay out, and that's when you miss the big move! Or you decide 'Right, we're in chop. I'm gonna short move up and buy moves down. Bollinger band style trading'', and that's when it makes the trend move and you are stopped yet again