Random buying and selling, and day trading

So you're saying you trade based on no information at all and don't have slippage or commissions

 

I did mostly arbitrage, so no I didn't refer to things like charts or financial statements.

Slippage wasn't a problem for the instrument that I was trading, though I had a hard time finding a broker who would let me trade those things for cheap.

 

Isn't it profitable if you follow a leader e.g MF.