If a lot of luck is involved then I wouldn't call it a great trading strategy. Luck will always play a part in life, but I wouldn't recommend to start trading with the only hope of being lucky to become profitable. In the past I tried myself with arbitrage trading and only achieved mixed results. The price differences I noticed on a few exchanges was quite small and when trying to take advantage of them they were also short lived. It's good to keep an eye open for arbitrage opportunities, but I found that only relying on it is not going to work. It requires a lot of time to observe the markets and compare prices on various exchanges constantly. Also, there is a big competition for arbitrage trades, which is why most opportunities are going to be very quickly. Arbitrage trading is the closest we can come to a risk-free profit, because we buy and sell the same security at the same time.