代码片段（通达信）：

BUY:= 你的买进信号;
SELL:= 你的卖出信号;

B2:=BARSLAST(BUY);
S2:=BARSLAST(SELL);

FBUY:=CROSS(S2,B2);
FSELL:=CROSS(B2,S2);

过滤后的买进信号:= BUY AND FBUY;
过滤后的卖出信号:= SELL AND FSELL;

示例代码：

过滤前:C;
BUY:= C>REF(C,1)*1.05;
SELL:= C<REF(C,1)*0.97;

B2:=BARSLAST(BUY);
S2:=BARSLAST(SELL);

FBUY:=CROSS(S2,B2);
FSELL:=CROSS(B2,S2);

BUYNEW:= BUY AND FBUY;
SELLNEW:= SELL AND FSELL;

过滤后: 过滤前+5;
DRAWICON(BUYNEW,过滤后,1);
DRAWICON(SELLNEW,过滤后,2);

DRAWICON(BUY, 过滤前,1);
DRAWICON(SELL, 过滤前,2);