My advice : do not try with small amount because withdraw fee from exchanges could make no profit for swap.
Trying with big amounts is even more dangerous, especially when arbitrage opportunities usually arise from exchanges such as HitBTC, Yobit, etc. that hold ambiguous regulatory statuses and a history of less than reputable behaviour. You may be putting your capital at risk here even if on paper this trade is guaranteed profit.
yes we only should try with big amount with trusted exchanges to avoid any issue like this