[求助]求和问题 (文华财经WH6赢顺V6.7)

刚才提问的有错误，不好意思。  

MA5:=MA(CLOSE,5);
MA10:=MA(CLOSE,10);
VOL5:=MA(VOL,5);
VOL10:=MA(VOL,10);
UP:MA5>MA10 && VOL5>VOL10;
DOWN:MA5<MA10 &&  VOL5<VOL10;
N:=BARSLAST(CROSS(UP,0.5))+1;
M:=BARSLAST(CROSS(DOWN,0.5))+1;

SS:=MA5-MA10;

请问如何编写：N段落的SS求和

 参考：

SUM(SS,N);