Indeed its a simple rule that not everyone can follow because of greed to earn huge if you use a big capital. We think its a guarantee that you can succeed as a trader so it wont be hard to get back the capital you use. But we know thats not the case, it seems easy to be a trader but there's more to learn and we need to gain experience. Also it takes guts and a lot of patience, so if you cant follow this simple rule then it will be hard if you experience to lose.