This is a base and easy trading strategy for comparing my other strategy. The strategy consider K >= 80 is strong target in the last high period, and consider K <=20 is the weak target in the last low period.
In the strong target, the strategy may increase long at the first day when K < 50, until 2/3 max order limitation or strong target become to weak. In the weak target, the strategy may increase short at the first day when K > 50, until 2/3 max order limitation or strong target become to strong.
there are three orders for this strategy. when the strong become to weak, it may use the remain 1/3 to save itself, and change the direction at the next k > 50 when the weak become to weak, it may use the remain 1/3 to save itself, and change the direction at the next k < 50