有谁能看懂这段程序------vt 的

	有哪位大侠能指点，不胜感激！！！ 一个很好交易系统，想做一下修改，但看不懂程序不知道命令怎么用？ VT-Fractal Trading System 以下是程序： {Up and Down Level Fractal} F1:=ValueWhen(1,H<Ref(H,-2) AND Ref(H,-1)<Ref(H,-2) AND Ref(H,-3)<Ref(H,-2) AND Ref(H,-4)<Ref(H,-2),Ref(H,-2)); F2:=ValueWhen(1,L>Ref(L,-2) AND Ref(L,-1)>Ref(L,-2) AND Ref(L,-3)>Ref(L,-2) AND Ref(L,-4)>Ref(L,-2),Ref(L,-2)); {Cross Up and Down Level Fractal} a:=Cross(H,F1); b:=Cross(F2,L); state:=BarsSince(a)<BarsSince(b); {Signal Long and Short} ShortSignal:= state < Ref(state,-1); LongSignal:= state > Ref(state,-1); {Trend Up and Down} UpTrend:=state>0; DownTrend:=state<1; {OpenBuy and CloseBuy} OpenBuy:=LongSignal and (eventCount('OpenBuy')= eventCount('CloseBuy')); CloseBuy:= ShortSignal and (eventCount('OpenBuy')>eventCount('CloseBuy')); {OpenSell and CloseSell} OpenSell:=  ShortSignal and (eventCount('OpenSell')= eventCount('CloseSell')); CloseSell:=  LongSignal and (eventCount('OpenSell')>eventCount('CloseSell'));

	呵呵，不懂也来关税