把“在一个MACD周期内，标出DIFF的最小值”搬到主图上，在K线上

编写要求：

希望能把副图指标搬到主图指标上，在k线上，最低收盘价位置划一条线， 另外，线的长短也最好能在主图上体现 {飞狐} DIFF : EMA(CLOSE,12) - EMA(CLOSE,26); DEA : EMA(DIFF,9); MACD : 2*(DIFF-DEA), COLORSTICK; bn:=BARSLAST(cross(dea,diff)); ba:=BACKSET(cross(diff,dea),LLVBARS(diff,bn+1)+1); bn2:=BARSLAST(ref(ba,1)=0 and ba=1); PARTLINE(bn2 and ba,ref(diff,bn2)),color0000ff,LINETHICK3; 最小DIFF:ref(diff,bn2),POINTDOT,color00ff00;

解答：

?diff := ema(close,12) - ema(close,26);

dea ?:= ema(diff,9);