what is the difference between these 2 methods?

[gubbar924]

Hello,

What is the difference between using these 2 seemingly real time methods?

1) placing code in the OnBarUpdate section while Calculate On Bar Close is set to false
2) placing code in the OnMarketData section

also, when is it preferable to use one over the other?

thanks again

[koganam]

Hello,

What is the difference between using these 2 seemingly real time methods?

1) placing code in the OnBarUpdate section while Calculate On Bar Close is set to false
2) placing code in the OnMarketData section

also, when is it preferable to use one over the other?

thanks again

Not much, other than OnMarketData() is realtime only, so cannot be backtested or optimized.

[gubbar924]

thank you for the explanation

[NinjaTrader_PatrickH]

Hello gubbar924,

Thank you for your post.

OnBarUpdate() is called whenever the bar is updated. Where OnMarketData() is real-time only and is called whenever market data is updated. So updates to Bid, Ask, Last and Volume would be seen in OnMarketData() and only in OnBarUpdate() if the change updated the bar. OnBarUpdate() can also be restricted solely to when a bar closes by setting CalculateOnBarClose to True.

OnMarketData(): http://www.ninjatrader.com/support/h...marketdata.htm
OnBarUpdate(): http://www.ninjatrader.com/support/h...nbarupdate.htm
CalculateOnBarClose: http://www.ninjatrader.com/support/h...onbarclose.htm

Please let me know if I may be of further assistance.