st0988的穿头破脚阴线买入法

此方法使选出股股票后次日逢低买入，
AA:=REF(CLOSE,4) REF(CLOSE,3) AND REF(OPEN,4) REF(CLOSE,3) AND REF(CLOSE,4) REF(OPEN,3) AND REF(OPEN,3) REF(OPEN,4);
YM:AA AND CLOSE REF(CLOSE,1);