marco
January 18, 2017, 2:22pm
1
Dear All,
With the latest upgrades to Custom Formulas (see here ) you can now pass variables with SetVar. Here’s an example:
Create a custom formula like this
$return_var = @var // simply returns the value in @var
In the screener type these formulas
setvar(@var ,5) and showvar(@a ,$return_var)
setvar(@var ,10) and showvar(@b ,$return_var)
When you run this the custom formula $return_var will be executed twice for each stock and will set @a to 5 and @b to 10
Hope this helps
Marco,
Will SetVar ever handle strings? This doesn’t work now;
ShowVar(@SYMBOL ,“XLP”) & ShowVar(@SYM ,$SYMBOL)
where $SYMBOL=@SYMBOL
Walter
marco
January 18, 2017, 4:51pm
4
Walter, Not supported. Maybe there are other ways. What are you trying to do ?
I’m good, Marco. There are other techniques I can use.
Thanks,
Walter
Just noticed some limitation on passing through values.
A variable set in a buy rule isn’t seen by a custom formula in a ranking rule. I’m guessing it an ‘order of evaluation’ thing i.e. the ranking module of run prior to the buy/sell module or scoping.
Just sayin’
Walter
Hi Marco,
This doesn’t seem to work;
$signal=LoopSum("Close(CTR)",@Bars)
SetVar(@Bars,10)
$signal
I get this as an error report;
Error in Buy Rule ‘Buy14’: In $signal: Invalid parameters for LoopSum
Walter
primus
January 6, 2018, 6:40pm
8
Just reading this now. So if I’m interpreting this feature right, it effectively allows users to reuse single parameter functions?
I don’t know if it’s limited to single parameter functions. I don’t think so, but I haven’t used this trick in a while.
Walter
Got Invalid Parameters for LoopMin message
This may be limited to the loop function. I am able to pass variables to custom formula successfully. Very handy…