买卖净量（源码 图 无未来）

STICKLINE(SH =45,0,SH,2,0),COLORCCCCCC;
STICKLINE(SH =0 AND SH 20,0,SH,2,0),COLOR0000AA;
STICKLINE(SH =20 AND SH 45,0,SH,2,0),COLOR0000FF;
STICKLINE(SH 0,0,SH,2,0),COLOR009900;