One of the challenges of using a Bot to trade is that it can malfunction in case of a spike or fake-out. Another thing is that when Market Dynamism changes it may not be able to detect this also depends on the program it is functioning with.
I have never made use of an Artificial intelligence trading bot before but I know that any of these bots can give a wrong signal especially when the market is in a volatile market. Bits are created by humans and we don't expect them to have there own flux because there are still on the prospect of becoming amended and getting to the level of accuracy. If a human can trade in the market for many years and still make loses then why not a bot that is built based on some certain mechanism of functions. A bot can have a 90% of accuracy but can not have upto 100%.