Indicator values from strategy

[Downhillryder]

Hi

Can you tell me if there is a difference between calling an indicator from a strategy when the indicator is added by the code or just referenced.

e.g is

protectedoverridevoid Initialize()
{
Add(SmoothedRsiInverseFisherTransform(4,4));
....
}

protectedoverridevoid OnBarUpdate()
{
if (Rising(SmoothedRsiInverseFisherTransform(4,4)))
.....
}


different from


protectedoverridevoid Initialize()
{
stuff ....
}

protectedoverridevoid OnBarUpdate()
{
if (Rising(SmoothedRsiInverseFisherTransform(4,4)))
.....
}


Could there be therefore a difference in indicator values used by the code and those displayed ?

probably a silly question but I'm trying to locate behaviour difference in my strategy between live and backtested data.

thanks for any help

regards dave

[NinjaTrader_Lance]

When you Add(indicator) in initialize() it will plot it on the chart.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?add2.htm

In terms of calculations if the indicator is called from within the script it will only be added to memory once. It will not have to be re-added each time it is called in order to conserve memory.

In your example the difference would be that the first one plots it and the second one does not plot.

Let me know if I can be of further assistance.

[Downhillryder]

Thanks Lance

Suppose I don't use the Add statement and just reference the indicator and supose that it isn't tested until bar 100 i.e

protectedoverridevoid OnBarUpdate()
{
if (CurrentBar < 100)
// Dont ever reference SmoothedInverse etc
else if (CurrentBar > 100)
if (Rising(SmoothedRsiInverseFisherTransform(4,4)))
.....
}

Is the indicator added at that point and how many bars will the indicator contain ?


thanks for your help

regards dave

[NinjaTrader_Lance]

No calculations will be performed until CurrentBar > 100

At that point it would run the SmoothedRsiInverseFisherTransform() over the available data. These values are then stored internally.

It will then wait until the next time it is called, and run the calculations between the results of the first time it was ran up to the current value needed.

Let me know if I can further clarify this further.