Bid and ask rouding

[Dzammer]

NinjaTrader 7.0.1000.31
I am try to calculate trall like this

double new_trall;
new_trall = GetCurrentBid() - stop_loss2 * TickSize; 

And sometimes i have results like this:

new_trall = 1057.6000000000001
stop_loss2 = 8
TickSize = 0.1
GetCurrentBid() = 1058.4

Why? And how i can get correct result?

[NinjaTrader_Jesse]

Hello,

Thank you for the question.

I see that the majority of the result is correct, are you referring to the remainder left over? This can happen with floating point math, there is a more clear description of common issues here: http://ninjatrader.com/support/forum...ead.php?t=3929

If you want to ensure the value is a valid price value aligned with a TickSize, you could use the Round2TickSize method to ensure the output is always a valid price.

Instrument.MasterInstrument.Round2TickSize(GetCurrentBid() - (stop_loss2 * TickSize));

Otherwise to maintain the value with a limited remainder, the Math.Round method could be used to Round it to X number of places:

Math.Round(GetCurrentBid() - (stop_loss2 * TickSize), 2);

I look forward to being of further assistance.

[Dzammer]

Thank you.

Instrument.MasterInstrument.Round2TickSize(GetCurrentBid() - (stop_loss2 * TickSize));

It's worked for me.