Unlike statements

[NinjaTrader_ChelseaB]

Hi turbofib,

It really depends on what you are trying to do.

If you are trying to get a value at startup time that you want not to change then you should not put this in OnBarUpdate.

If you are trying to call the value of an indicator on every bar then put this in OnBarUpdate.

May I ask, what are you trying to accomplish?

[turbofib]

i give you an example:
analyzes the historical and call an indicator by passing different parameters to each bar in order to optimize
Or call an indicator with different settings of the timeframe based on the volatility of the market

[koganam]

i give you an example:
analyzes the historical and call an indicator by passing different parameters to each bar in order to optimize
Or call an indicator with different settings of the timeframe based on the volatility of the market

Yes, that would mean you reinitialize whenever you want to change parameters. That would have to be in OBU. However, I do not understand what you are trying to do. How do you determine what to change the parameters to (when you talk of "to optimize"). Are you trying to optimize on the fly while the strategy is actually running?

Optimization is done using the Strategy Analyzer, which handles changing values of public parameters in order to find the curve fitted optimal values. Why do you need to change parameters midstream?

I guess I can understand changing parameters based on volatility.

[esignal]

yes but there are various ways to make the indicators ...
I do not want to hand find the optimal parameters by optimizing the end .. but I want it that way by them is

I and turbofib work together

[turbofib]

is Correct!

[NinjaTrader_ChelseaB]

Hi turbofib,

If you are attempting to call an indicator using different parameters on each new bar, then yes you will want to put this in OnBarUpdate().