I really like David Halsey's method. A very nice complement to other tools. 50% is the buy, and 61.8 the stop. On the big dailies, entries are only confirmed by good setups on the 15 min. Them's the basics. Then you've got measured moves and extended, and series of either. "Anchors" are where you draw from, the last swing low to recent recovery highs, for example. You buy the 50% retrace on 15 minute confirmation in pair positions, sell half at breakeven and the rest at the -23.6. That's only for starters. Check it out.
http://eminiaddict.com/

He's trading the S&P mini. Crypto often goes to the -38.3 and -61.8. I often let it ride until getting a sell signal, which comes in exact opposite fashion.

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