买线:EMA(C,2);
卖线:EMA(S LOPE (C,21)*20+C,42);
BUY:=C ROSS (买线,卖线);
SEL:=CROSS(卖线,买线);
DRAWTEXT(buy,LOW*0.99,‘买‘),COLORRED;
DRAWTEXT(sel, HIGH *1.025,‘卖‘),COLOR GREE N;
STICK LINE (CROSS(买线,卖线) OR CROSS(