Martingale System still possible?

[go2toa]

In other forum threads, I see an old discussion about implementing the Martingale system One suggestion was to use

(Performance.AllTrades[Performance.AllTrades.Count - 1].ProfitCurrency

I got compile time errors with this, but can compile if I use "SystemPerformance". When I go to use the code however, I get a new error in the log. My question is, has the object model been deprecated to make Martingale logic no longer possible?

[NinjaTrader_Gaby]

Hello go2toa,

Thank you for your post.

Likely you are looking at NinjaTrader 7 code that just needs to converted into NinjaTrader 8. What is the exact error you are getting the log?

Below I am including a link to a list of the code breaking changes from NT7 to NT8.
http://ninjatrader.com/support/helpG...ng_changes.htm

When first starting to port scripts, I myself would open the NT7 help guide and the NT8 help guide to the same sections so that I could compare.

The majority of code supported by NinjaTrader is included in the help guides.

Below is a link to a forum post with helpful information about getting started with NinjaScript.

https://support.ninjatrader.com/s/article/Developer-Guide-Getting-Started-with-NinjaScript

[go2toa]

I appreciate the link to the table with new/old terms. That is something I was not aware of so, thank you.

That code is accessing profitcurrency 2 trades back in time, when I only want to check 1 trade back in time. To answer your question, the log reveals that I cannot remove the -1 to get the most recent trade profitability If I remove the one, ie.

SystemPerformance.AllTrades[SystemPerformance.AllTrades.Count].ProfitCurrency

says "you are accessing an index with a value that is invalid since it is out-of-range."

I'm guessing there is some sort of "profit calculation engine" in the code, and for some odd reason, it needs an extra, newer trade, to finish calculating profit.

[NinjaTrader_Gaby]

Hello,

Make sure you are checking that the collection is greater than 0 before accessing any index.

The code in this HG page demonstrates:

https://ninjatrader.com/support/helpguides/nt8/trade.htm