A very simple, almost naive strategy, in which you buy on the lowest of the two previous candles and sell at the highest of the two previous candles. You can configure these highest and lowest lenght, in some assets two is too small of a number to make profit. You can also configure to exit the position after X, and I found that 7 (which is a week of working days) is a good number for that.
This is strategy is intended to be used as a swing trade. Your capital needs to be high enough so that it can pay the operaitonal costs, and reach it's target with a reasonable profit.
Since this is a volatility
based strategy, assets that are more liquid won't work properly.