Does your bot charge some kind of hidden commission?
None, only Binance trading fees.
If i will be using the BNB token, the commission will be reduced, right?
Dear oprah, Yes, We recommend using BNB to pay for trade fees to get Binances trade discount. You have to set that up yourself in your Binance account main profile page.
Does your bot work only for Binance or for Binance DEX as well?
Hey there, Not in Binance Dex yet, our bot now is working only on Binance. Other exchanges are not available right now and still in coding. We'll update everyone if we have new one.

If it's not a secret, on which exchanges will your bot work as well? For BitMex?
For margin trading, does a bot produce the same performance indicators, or is it less effective? As far as I know, margin trading is more expensive in terms of commission and more risky, I prefer to trade without leverage and use spot-limit.
It does not matter what type of trading - with or without leverage, the commission depends on the exchange and on other factors, for example the use of bonuses of exchange tokens.