K1:=SUM(AMOUNT,0)/SUM(VOL,0)/100;K2:=C>=K1*0.95 AND C<=K1*1.05;XG:REF(EVERY(K2,0)>=0,1) AND C>K1*1.05;
选股看kdj线，简单说就看线有没有交叉，分金叉(买入信号)和死叉(卖出信号)，
