fixamount

[okokkokok]

#1665

[you-n-g]

Thanks for you pull request.

Current implementation is inconsistent.
It sell all the remain stock. But the cash is increase based on the original intented amount.

If it is caused by float precision, we may try to solve this by making the error tolerance (i.e. -1e-5) lager and configurable.

[Abhijais4896]

if np.isclose(self.position[stock_id]["amount"], trade_amount):

        if np.isclose(self.position[stock_id]["amount"], trade_amount) or self.position[stock_id]["amount"] <= trade_amount: