I have lost to my favorite trading platform many times by a difference of 0.01, 0.02, or even 0.001. For example, I started betting at 7161.64 and predicted that it would go up in 5 minutes; however, the eventual price was 7161.63, and I lost. This often happens when I bet a huge percentage of my account balance, such as €30, €50, and €70. It doesn't likely to happen when I bet small amounts, such as €2, €5, and €10.
Is this a scam caused by the broker?