Invalid order error handling

[rhettre]

Implement better error handling around methods when users try to make invalid orders

Youtube comment:
this is great! thanks for sharing, I have tried fiat_limit_buy and noticed when I pass on a float like 1.001 inside the price_multiplier to place a buy order slightly above the current price (to instantly buy) it comes back with an an unknown error. When I change the float to something like 0.9 then it does work but the order is below the current price. How can I make it place the limit order above the current price ?