Ninja trader possible laging

[Christopher Leggit]

Just a query on indicators not needing help with code
I understand "onbarclose" reduces the possibility of lag in data loading. I have a time zone indicator that calculates onbarclose;

My question is can it still cause lag?

And If so, if i change that for a very simple line of code to paint the background color for that time i require instead

Would that reduce any little lag?

I have a few custom indicators that require calculate oneachtick; and ive noticed a minor slow down in data loading.

[NinjaTrader_ChelseaB]

Hello Christopher Leggit,

The Calculate setting controls how often the logic in OnBarUpdate is evaluated. With OnBarClose the logic is only evaluated when the bar closes. With OnPriceChange the logic is evaluated for every price change. With OnEachTick the logic is evaluated for every tick.

The more cycles the logic is evaluated, the more work the CPU has to do.

Any script with heavy computation can cause high CPU resource use. (For example an infinite while loop will just freeze the computer core instantly with just two lines of code)

Where you have inquired:

if i change that for a very simple line of code to paint the background color for that time i require instead

I'm not quite sure what you are asking.

However if you are asking if setting the BackBrush is high resource use, this in itself would not be. But doing any action a few thousand times a second would cause high resource use. So if you are setting the BackBrush once per bar, no, this would not be resource intensive.

Below is a link to a forum post that discusses performance.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/platform-technical-support-aa/1055200-nt8-jump-in-memory-usage?p=1055235#post1055235