Why do markers stop painting even tho no compile errors

August 13th, 2009, 10:49 PM

1. The attached code shows line 83 encircled. If this is commented out, the code above it (lines 55 through 78) execute correctly... uncommented, they don't. There are no compile errors either way.

2. I am trying to set up variables in order to test whether or not Stochastics(1,20,3).K is rising... while I understand that I can use the "Rising" method directly on the Stochastics data series, what is there about line 83 that can cause the above lines to be in error?

TIA

[also posted in the NT Forum]

August 13th, 2009, 11:15 PM

Because the Index of 1 doesn't exist yet.

You'll see an index error in the Log.

Add:

if (CurrentBar < 1) return;

To the top of the OnBarUpdate() section.

Mike

August 13th, 2009, 11:27 PM

ahh.. thanks... forgot all about that pesky "are there enuf bars yet" thing...

what about the Stochastics 540? do I need to do "if (CurrentBar < 540) return;" ?It doesn't seem to be causing any problems although it doesn't have that painted at the beginning of the chart.

roonius · August 14th, 2009, 12:02 PM

Saroj

ahh.. thanks... forgot all about that pesky "are there enuf bars yet" thing...

what about the Stochastics 540? do I need to do "if (CurrentBar < 540) return;" ?It doesn't seem to be causing any problems although it doesn't have that painted at the beginning of the chart.

You need to make sure that you have enough bars when you reference bars back
For example:

SMA(200)[0] - ok - you are referencing the last bar

SMA(200)[200] - you are referencing a bar 200 bars back. So you need to add:
if (currentBar < 200) return;

SMA(200) - 200 in parameters is checked inside SMA itself.

August 14th, 2009, 05:37 PM

thanks roonius... appreciate the confirmation... I set it to 541 since I use a BB540 and a stochastic 540... and ... on a personal note... hope you enjoy living in Chicago as much as I did (well... Evanston, but mostly worked in center city)... best city in the U.S.A.!

Why do markers stop painting even tho no compile errors

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Why do markers stop painting even tho no compile errors