I have studied Megaphones long time and always see different possibilities but when I test them, not so grand. So I avoid anything where I am getting in close to that 18sma or beyond, I will take Counter-trend trades. Major problem with Megaphones, you have to identify quickly or you end up being trapped, good think about Megaphones is they not known to expand too quickly so if you have wide enough stops, they won't get tripped. Even when Megaphones end cause other pivots develop, if they are within the highs/lows, they become range chop, so breakout trend trades are still no no, till new highs/lows happen.
Good signals happen then gone, any time price hangs around my entry, not very good as a Scalper since I am trying to make 1-8 ticks, I find using 3 bars gives way enough time to see if price goes my way, and if at a loss, new target is plus one tick. Much rather make one tick profit than a loss and have no feelings at all if trade does go to 8 ticks, there are many trades in a lifetime, missing one of something is nothing.
Starbuck time.