i don't know of any, and i doubt that any out there would really teach you anything. do a search. i'd recommend to just watch it for a while and will start to make sense. don't watch JUST L2, i mean watch it in addition to whatever else you look at.. it WILL start to make sense... and if it doesn't..well, ...too bad
As usual, Daniel has made a valid point. Since I DON'T try and scalp, and I virtually never hold a position for less than a half hour or so, to me, I find L2 close to worthless. But he's right. If L2 (or anything) helps you to make money, then it is of tremendous value. I do think there are better tools, but most are proprietary or very expensive. (One of the many reasons I prefer not to work at home or to trade my own money). Rs7