GetProfitLoss returns a very long decimal number

[xmms1]

Hello,
I am backtesting mini russell2000 (symbol TF). It uses just one decimal number.

For example my trade was short at entry price 633.4 and when the price reaches 629.6, I run

Print(Position.GetProfitLoss(Close[0], PerformanceUnit.Points));

I expected the result 3,8 would be returned.
But it returns 3,79999999999995.

What does that suppose to mean? How do I fix it?

[NinjaTrader_RyanM1]

Hello Xmms1,

Thank you for your post.

You are running into issues with floating-point arithmetic. Please see the post below for more information.

http://www.ninjatrader-support2.com/vb/showthread.php?t=3929

One potential work around here is using Round2TickSize()