通达信公式编写：30日内突破均线且今日低点低于20日均线

C1:=REF(CLOSE,1)>MA(CLOSE,10) AND MA(CLOSE,10)<MA(CLOSE,30); C2:=REF(CLOSE,1)>MA(CLOSE,20) AND MA(CLOSE,20)<MA(CLOSE,30); C3:=LOW<=MA(CLOSE,20); C1 AND C2 AND C3;