What securities are you trading?
What instruments you using to trade them?
What's your strategy & game-plan?
There are many, many ways to tip the balance between losses and winners. You may not be able to change the odds, such as the likelihood of something going up or going down, but you CAN change how much you lose versus win when that even occurs.
For example, let's say XYZ goes up 5% today. Trader1 can gain 5% on that move, Trader2 can lose 5% on that move and Trader3 can win 50% on that exact same move. The results will vary depending upon what instruments you use and your strategies.