怎样编写MACD底背离和顶背离函数

DIFF:EMA(CLOSE,SHORT) - EMA(CLOSE,LONG); 

DEA:EMA(DIFF,M); 

MACD:2*(DIFF-DEA), COLORSTICK; 

底背离:LLV(L,N)=L AND NOT(LLV(MACD,N)=MACD),COLORFF00FF; 

顶背离:HHV(H,N)=H AND NOT(HHV(MACD,N)=MACD),COLORFFFFFF;