4,20,62 经典的主图指标！！

ma4:ma(close,4);
ma20:ma(close,20);
ma62:ma(close,62);
drawtext(ma4>ref(ma4,1) and ma20>ref(ma20,1) and ma62>ref(ma62,1) and cross(ma4,ma20) and ATan(ma20-ref(ma20,1)/ref(ma20,1))>=30/1000,l-0.3,'★买'),coloryellow;