Floating point issue with simple price operations

[pstrusi]

I'm having a weird floating point issue with a simple subtract operation between two EURUSD prices, that should give some number up to 5 significative decimals, yet it gives almost the right number but there's always a 0.0000000000x that pops up, and being this a simple add/subtract operation between two direct prices, I think it shouldn't give anything like this. I don't know if this feedback is useful for you but it's a heads up.

In order to address it, which way would you suggest:

1. Rounding float type ?

or

2. Using decimal types ?

Update:
Personal choice #1, it allows an easier writing and readable code

[NinjaTrader_ChrisL]

Hello pstrusi,

Thank you for the post.

Rounding the float will likely be the best thing to use. Using decimal will use an unnecessary amount of memory.

I would advise using the following:

Round(Double, Int32)

Here is a publicly available link to Round on the MSDN Documentation:

https://msdn.microsoft.com/en-us/library/75ks3aby(v=vs.110).aspx

Could you please post the code you are using to perform the subtraction operation?

I look forward to your reply.