In every trading, there is always a chance of lossing, There is no such thing as 100% sure win. However, you might be able to avoid that by proper strategy on your trading. You need to consider your cost on trading, you need to sell it higher than your cost so that you will not lose. But there is also a risk that the market will goes down, you might encounter losses, the only thing you need to do is to minimize your losses to a minimal amount.