老师这个编译不通过！请帮改下

山水

runmode:0;
input:length(20,5,60,5);
input:ratio(4,1,5,1);
variable:trend=0;
variable:stopprice=0;
prebarhigh:=ref(high,1);
prebarlow:=ref(low,1);
atr:=trimprice(ref(ema(high-low,length),1));
trailingstop:=ratio*atr;
if barpos>length and trend=0 then begin
trend:=1;
stopprice:=prebarlow-trailingstop;
drawicon(1,prebarlow-trailingstop,8,0);
drawtext(1,prebarlow-trailingstop,\'开多\',colorred,1);
end
if trend=1 then begin
if prebarlow-trailingstop>stopprice then
stopprice:=prebarlow-trailingstop;
if low<=stopprice then begin
trend:=-1;
stopprice:=prebarhigh+trailingstop;
drawicon(1,prebarhigh+trailingstop,9,0);
drawtext(1,prebarhigh+trailingstop,\'开空\',colorgreen,1);
end
stickline(close>=open,high,close,1,1,colorred);
stickline(close>=open,close,open,10,1,colorred);
stickline(close>=open,open,low,1,1,colorred);
stickline(close<open,high,open,1,0,colorred);
stickline(close<open,open,close,10,0,colorred);
stickline(close<open,close,low,1,0,colorred);
end
if trend=-1 then begin
if prebarhigh+trailingstop<stopprice then
stopprice:=prebarhigh+trailingstop;
if high>=stopprice then begin
trend:=1;
stopprice:=prebarlow-trailingstop;
drawicon(1,prebarlow-trailingstop,8,0);
drawtext(1,prebarlow-trailingstop,\'开多\',colorred,1);
end
stickline(close>=open,high,close,1,1,colorgreen);
stickline(close>=open,close,open,10,1,colorgreen);
stickline(close>=open,open,low,1,1,colorgreen);
stickline(close<open,high,open,1,0,colorgreen);
stickline(close<open,open,close,10,0,colorgreen);
stickline(close<open,close,low,1,0,colorgreen);
end
drawicon(trend=1,stopprice,10);
drawicon(trend=-1,stopprice,11);

技术009

编译时候已经明确提示你了 trend 不能作为变量名称，它是系统函数。你把所有的trend 换成其他变量名称就行了。

山水

谢谢