When going into a TREND trade, you scale in - slowly - start with teaser dips - then when the trade starts moaning and sighing, scale in some more. You will get to a point where the high frequency sound of the emanating waves are just beginning - that will be your last scale in to the trade. You don't invest any more into the trade because from that point on the trade will run on its own momentum. When the high frequency sounds of the 3rd wave reach 24kHz, let out a couple low frequency growls, that will take the high frequencies to their top of the range of around 30 Khz.
For scaling out of the trade I would just keep moving the trailing Stop up to just under the start of any new high frequency pitch as that is the sign of one wave low and a new upwave starting.
After trade exit is when its apparently most important. You want to be considerate and kind and sweet or else your future trades are gong to evaporate into Non-Existence, a very difficult condition to work out of.
Good luck. do it this way and you will not need Photoshop no more