Error on calculating indicator min/max value for indicator 'RSI'. Please check the 'GetMinMaxValues' method: Index was outside the bounds of the array.

Attached is the indicator.

By default there is no 'symbol1' .. 'symbol10' (blank string). The error only occurs when using RSI and selecting this indicator as the input series. If you plot the indicator by itself (no RSI) it works fine.

The error also only occurs when symbol1 (or greater) are populated. So to reproduce, set symbol1 to something (ie SPY, ES 09-12, AAPL, etc). It will plot by itself fine, but when used inside RSI it generates the above error.

I couldn't find a resolution so far or even what is causing the problem.



Help appreciated. Don't laugh at code, I'm 3-years out of practice writing C#.

Mike

I contacted NT support, and it seems that Add() does not support dynamic calls.

What I don't understand is why it works as a stand-alone indicator, with the code as-is, which includes a dynamic Add() [in other words, the instrument is a variable and not fixed in the code].... but yet doesn't work when wrapping RSI around it.

Or perhaps it isn't working correctly now, and I've just not realized that the plot is completely wrong?

Mike

Running it just as an indicator may work as this all depends on when Initialize() is called.

When the indicator is selected to be added to the chart to define the properties Initialize() is run at that time. It can get recalled again once again when you actually hit ok to accept the changed that you made via setting the properties. This is explained as the last bullet point in our help guide which actually allows your initial indicator setup to work on its own: Initialize()

However when adding it as an input series this Initialize() is not re-run so your settings are not maintained when it comes to changing actual output in the Initialize() block based on user input.

Therefor this is why right click->reload historical data will re run initialize() with your properties set and cause your indicator to then start working.

This is part of the reasons why dynamic adding of secondary series is not supported as there is also other consideration for this functionality. For example an issue you can run into is if you run an indicator with dynamic add calls in Intialize() and then remove a secondary added series this would cause an exception since Disposing that secondary series is not expected. So there are other reasons why we do not support dynamic adding of data series in Initialize() and although it may work it would be unsupported and you may run into little things like what you did today.

...I suspect that

-> the code in the Initialize and Properties section is already executed when you open the indicator dialogue box of the chart panel, otherwise you would not see the information in the dialogue box
-> the Initialize() section is executed again, when the indicator is added to the chart, thus taking into account the new parameters

@Fat Tails,

So Harry, do you see any problem with me calling it via a strategy? I believe that in a backtest, each run causes a Init(). As for running the strategy live on a chart, I guess I may need to hit F5?

I need to do a lot more testing...

thx for your help.

Mike