如何用表达式表达两均线相交点的汇市价格?

cold-river

double MA_Fast_Now = iMA(NULL,0,15,0,MODE_SMA,PRICE_CLOSE,0);
double MA_Slow_Now = iMA(NULL,0,30,0,MODE_SMA,PRICE_CLOSE,0);
double MA_Fast_Previous = iMA(NULL,0,15,0,MODE_SMA,PRICE_CLOSE,1);
double MA_Slow_Previous = iMA(NULL,0,30,0,MODE_SMA,PRICE_CLOSE,1);

if (MA_Fast_Now == MA_Slow_Now && MA_Fast_Previous > MA_Slow_Previous) // 短期均线向下穿越长期均线
   double A = MA_Fast_Now; // A＝交叉点价格