Indicator on Indicator performance

[yesbee1]

Hi All,
I have a custom MACD plot that uses the shared MACD routine from Ninja. Part of my code is as follows.

double val0 = Math.Round(MACD(Fast, Slow, Smooth).Diff[0], 2);
double val1 = Math.Round(MACD(Fast, Slow, Smooth).Diff[1], 2);
//do plot val0 vs val1 on screen.

My question is when OnBarUpdate is called on my custom indicator, does calls tp MACD class cuase it to recalculate on the entire bar series or it calculates only for the current bar (with info for previous bar coming from cache) ?

Thanks.

[NinjaTrader_Ben]

Hello,

I think I understand. The values for the indicator are called up via the index. The calculations you have are performed each time there is an OnBarUpdate() event called. This link may help:

http://www.ninjatrader-support.com/HelpGuideV6/OnBarUpdateEvent.html

[yesbee1]

Hi Ben,
My question was on each bar update is MACD calculated for all the bars again or just for the latest bar? In other words, does the MACD indicator underlying my custom indicator caches values? Thanks.

[NinjaTrader_Bertrand]

yesbee1 - when you call an indicator, an internal instance of an indicator is created and added to a cache. Futures calls to this method loop through this cache in order to get the correct indicator instance or if one is not found, create a new one.