Quote from slumdog:
Slippage and commission costs tend to get covered up in high volatility high profitability markets. But when the markets aren't so rich for the picking you wonder why you are spinning your wheels and getting nowhere, and slippage and commissions tends to be reason.
An even bigger career killer than slippage and commission is living costs. A guy with a family and mortgage needs to make what at least 50K to get by, more or less, depending on lifestyle.
Once you factor in living costs, commissions, slippage and spread, a trader needs to make around 100k a year just to keep the account balance flat for the year. And the tax man wants his share too.
A tough game to be in.