Buying a source code trading app like this from Untrusted/unknown/Newbie users is pretty risky.
There are lots of free open-source trading apps like Gekko trading bot which function the same as yours.
Here's the open-source of the trading bot below if you want.
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https://github.com/askmike/gekkoThis is one of the trusted 100% free open-source trading bot so why we need to choose you?