x_1:=3*sma((close-llv(low,55))/(hhv(high,55)-llv(low,55))*100,5,1)-2*sma(sma((close-llv (low,55))/(hhv(high,55)-llv(low,55))*100,5,1),3,1);x_2:=ema(x_1,3);x_3:=(x_2-ref(x_2,1))/ref(x_2,1)*100;xg:x_2<=13 and x_3>13 and filter(x_2<=13 and x_3>13,10); 20210311