I am a beginner, and I must say, there are a lot of rules to the trading game that one must abide by if they want to be successful. Here, the writer mentions several basic rules for day vs swing trading. However, I find that often times, the reasoning for these rules is not as obvious for a beginner as it may be for an expert. The 'why' factor if I may.
For example, why must you have a large capital to trade with as a day trader?
Because your positions must be large so that a small change in price will be augmented and turned into a large profit.
Also, with such high risk, the margin will be specially high, given the trader is taking up large positions at a time. Without a large amount of capital, positions may be forced to close due to funds being below margin requirements. When this happens, you can expect to lose tons of cash, fast. I learned the hard way.
All the best,
David Franco