如何自己编写趋势线？

如题！谢谢

 

汗！什么东东，

 

看一下帮助文档，里面有很多例子，比如（WL 3/4X）：
{ Draw a line between the last 2 peaks }
var P1, P2: float;
var BAR, PB1, PB2: integer;
Bar := BarCount - 1;
p1 := Peak( Bar, #High, 4 );
pb1 := PeakBar( Bar, #High, 4 );
p2 := Peak( pb1, #High, 4 );
pb2 := PeakBar( pb1, #High, 4 );
DrawLine( pb1, p1, pb2, p2, 0, #Red, #Dotted );