I'm trying to convert a Tradestation ELS into Thinkscript. Here is the Tradestation code:

 

Code

inputs: Length(20); vars: srsi(0), srsin(0), k(0); srsin = 0; For k = 0 to Length - 1 Begin Value1 = absvalue(close[k] - open[k]; Value2 = absvalue(high[k] - low[k]; If value2 = 0 then value3 = 0 Else Value3 = value1/value2; srsin = srsin + value3; End; srsi = srsin/length; plot1(0.38); plot2(srsi); plot3(-0.38); plot4(0); If srsi > 0 then Setplotcolor(2,green); If srsi < 0 then Setplotcolor(2,red); If srsi >= -0.05 and srsi <= 0.05 then Setplotcolor(2,yellow); Setplotcolor(1,darkred); Setplotcolor(3,darkgreen); Setplotcolor(4,yellow);

Here is my attempt at converting it to Thinkscript:

 

Code

declare lower; input Length = 20; def srsi = 0; def srsin = 0; def k = 0; plot iteration = fold k = 0 to Length - 1; def Value1 = absvalue(close[k] - open[k]); def Value2 = absvalue(high[k] - low[k]); def Value = if value2 == 0 then value3 == 0 else value3 == value1 / value2; def srsin = srsin + value3; def srsi = srsin / Length; plot line1 = 0.38; line1.SetDefaultColor(Color.DARK_RED); line1.HideTitle(); line1.HideBubble(); plot line2 = srsi; line2.AssignValueColor(if srsi > 0 then Color.GREEN else if srsi < 0 then Color.RED else if srsi >= -0.05 and srsi <= 0.05 then Color.YELLOW else Color.GRAY); line2.SetLineWeight(2); line2.HideTitle(); plot line3 = -0.38; line3.SetDefaultColor(Color.DARK_GREEN); line3.HideTitle(); line3.HideBubble(); plot ZeroLine = 0; ZeroLine.SetDefaultColor(Color.ORANGE); ZeroLine.HideTitle(); ZeroLine.HideBubble();

The Thinkscript compiler says the fold statement is invalid. This is the first time I've attempted to work with a fold statement.

Any assistance would be greatly appreciated. Thanks in advance...

I briefly looked at the online reference for 'fold'. Two possibilities:

1) In fold, a 'do' keyword is not optional...your code is missing it however.
2) You've got the variable k being defined before the fold, it may not need to be? A def in thinkscript means a variable that holds a value for each bar, like a plot but with no visualization. So, that's completely different from a loop counter. Try deleting that line if it still complains.

ocpb 

I briefly looked at the online reference for 'fold'. Two possibilities: 1) In fold, a 'do' keyword is not optional...your code is missing it however. 2) You've got the variable k being defined before the fold, it may not need to be? A def in thinkscript means a variable that holds a value for each bar, like a plot but with no visualization. So, that's completely different from a loop counter. Try deleting that line if it still complains.

@ocpb,

Thanks for the reply and the insights. I really appreciate it