阶段性低点，准确度还不错的指标

EA:=((HHV(HIGH,21)-CLOSE)/(HHV(HIGH,21)-LLV(LOW,21)))*(100)-10;
EB:=((CLOSE-LLV(LOW,21))/(HHV(HIGH,21)-LLV(LOW,21)))*(100);
EC:=SMA(EB,13,8);
ED:=SMA(EA,21,8);
机会来临:=SMA(EC,13,8);
FILTER((COUNT((机会来临-ED (-65)),3)=3),34);