变色分时走势线(大智慧)

源码：
DRAWTEXTREL(460,950,'理想专用'),Color4B4B4B,LAYER4,LINETHICK3;
个股:c,linethick2,LAYER0,PRECIS2;
PARTLINE(c,c>ref(c,1),rgb(250,0,0),c<ref(c,1),rgb(0,250,0)),linethick2,LAYER0;