take a look at sstheo journal.
Thanks for the reference. Skimmed through his 2 journals, there are 59+ pages in both, so don't blame me if I missed something.
First of all - I have high respect for everyone who is trying so hard and being honest about their results.
This is actually a great example of what really happens when a trader "makes 20% every month with almost no losing day". They do, till they don't.
Not to generalize, but all examples I've seen (where there was enough info available) - it is nothing like that over a year period or even just 3 months. Most of the time the streak ends when market changes and they need to adapt, through this transition period there are losses, often way bigger than on "average plus day". Sometimes those losses lead to a complete halt of trading or paper trading for months to get back. Often positions sizes and risks taken are cut to a comfortable level and those returns will not be seen again.
Here are couple of quotes from his journal explaining the length of time and consistency we're talking about:
"
Oct 10, 2019: 6 weeks in now. Major milestone"
"
In fact, I have been pretty quiet here because my live AMP futures micro account has gone basically nowhere for three weeks now. The glorious gains have been muted by many frustrating failures."
About consistency and market changes - A friend of mine recently called and said - I would have made 10% return in one day if I would have bought TELUS (TU) at the open and sold at the close. He is pretty naive but I thought - let's entertain that idea. So you would have bought TU when? After it had a decline? How big was the decline? Would you be just trading TU every day? All US stocks? How many would you hold at the same time? How much money would you put in one if I tell you over a long enough period of time they can gap down 20-50%? When exactly would you buy? When what if it doesn't go up on the first day would you wait? So now he had a concept of what a simple system would consist of. Then, helped him to come up with some rules and wrote a backtest. I didn't need to run it too far back as I was certain few years of data will make a point. The result was - sometimes that system would actually make money, those periods can last 3 months, sometimes 6. But it would also stop working very often for months or even years. And if he would have run it long enough he would have lost all his money.
Regarding absolute returns, don't be too easily impressed by high numbers. How much money you will make during that streak doesn't have anything to do with skill. How much money you make when your system is working is always proportional to a risk taken. Double your risk - double your return. That easy.
Account size also matters. More than most people think. When someone has 2000$ - 200$ or 500$ loss might not sound that much because you can go mow a few lawns and it's like nothing even happened. Excercise for a few hours is good anyway right?

For instance, in most cases when people double their account fast or something like that, there is a high % risk involved on a single bet. But think about it - that is 10-25% of your account risk! Try to replicate the same when you have 1mil. Didn't work out and you are out of 100-250k... How many lawns would that take to forget?
PS. By no means, I am implying that "
sstheo" will not be making money long term. Just not with the consistency like "every month 20%, with almost no losing days". Certainly not over a year, and most certainly not over a period of any few years. I've done a very similar experiment in 2014 and had my 60 days no losing days streak day trading equities. Not the same instrument but I can relate to dynamics of what is happening to him.