Price rounding may yield incorrect results

[royrichter]

Description of Bug
When submitting an order, the function that rounds to two or four decimal places very occasionally rounds down an additional number. This function truncate_float is called with many order submissions. The issue is floating point arithmetic: e.g., 4.64*100=4.6399999999999994. I suggest using the python native function round() instead: return round(flt, 2) etc.

Code to Reproduce
from tda.orders.generic import truncate_float
a = 4.64
b = truncate_float(a)
print(a, b)

Expected Behavior
4.64 4.64

Actual Behavior
4.64 4.63

Error/Exception Log, If Applicable
N/A

[tirthb]

truncate_float(price) is not working 4.1 is giving "4.09"

https://github.com/alexgolec/tda-api/blob/master/tda/orders/generic.py#L35

I am passing the price as string for now.