kdj的J从下向上穿越2O轴发出信号公式
RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100; K:=SMA(RSV,3,1),COLORWHITE; D:=SMA(K,3,1),COLORYELLOW; J:=3*K-2*D,COLORFF00FF; 无敌:cross(j,20);
