As best my tired old mind can recall it was some thing like this. After 7 to 10 day of higher highs and higher lows place a trailing sell stop under the 7th day and follow the trend until it gets hit and you are wealthy. I'm not sure if that is 100% correct or complete. If it works for you I think 18% cut for me is reasonable.

That is something like what I do with pullbacks in a long trend..