Feature request: after buy order is filled, sell bought cryptocurrency

Hello,
I'm not sure, if I'm not too brazen, but  I will ask :) 
Please, add to code a feature to enable of selling the just bought lot. Ideally, there should be new settings in the config.json to define 

- must we sell the just bought cryptocurrency
- sell price percentage (with a warning in the README.md that it should be at lease then the maker fee (0.2%)

Thanks
