Well, scalping on forex begs very important question: is it possible to conduct any reasonable market analysis on the scalping timeframes? Determining sound trend on tick, 1 min or 5 min charts, where price is driven by million factors appears to be a nonsense for me. Winning probability in this case verge towards chances in gambling. The more entries you make the more you expose your feeble deposit to risk.
I do scalping with my broker Armada Markets but not in usual sense - I join the market only 2 times a week seeking before for vigorous movements induced by some major economic releases, holding positions less than 5 min. Min lots size is 5 lots. Winning trades - about 70%.
3 days for analysis - 5 min for trading. Good formula I guess..