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Make sure you own some physical silver. Seriously.

There are mispriced securities out there every day. You can effectively do arbitrage. The reason the little guy can do this is because you are not trading in size. There are opportunities that large quant funds can't effectively take advantage of with the amount of money they must invest just...

But, but, but... there is one issue with not chasing small/micro cap runners up in the morning: It will be very hard to make money.

Speed. But only if you need it. How much data are you storing? Daily OHLCV on all exchange traded US stocks? 1-min bars? All trade data and conditions? Store only what you use. There are a few hundred million trades each day on the exchanges just for US stocks. If you tried to store that...

There is, actually. If done right the solution even generates gains. That's what market making is all about.

Many people make money day trading. Few have the willingness to stick to it long enough to learn how. This is similar to other things in the world that are hard, yet very rewarding.

Other than a few billionaires I find that rich people do just the opposite. They work hard at keeping a low profile. Where do you get the idea that success and "widely known" correlate?

It is very easy to create a strategy that results in nearly 100% of your trades being profitable. New day traders frequently fall into this trap without realizing it. But when you get a large enough sample of trades so that the losing trades are properly represented the full picture then...

Buffett isn't being entirely honest. He knows that he can't make money if everyone else is as smart and rational as himself.

Be very clever. I've been creating and testing algorithms for this for 2 years and have made some slight progress. The answers are not intuitive. Practically no one is willing to share what they have learned about getting the most efficient order fills. A simple "mid price" order won't do...

Correct. Probability theory is the math you use to describe a set of values where you don't understand the function creating them.

For some it's gambling. For others it is a way to profit from their focus and study. For me it's a massive dataset, extremely cool engineering and software development that ultimately pays the bills. Only the gamblers get the attention. Anyone working hard and making money at this comes...

The NDA is important but it's also important to pick partners and not just hired help. If you both have your interests aligned then there will be fewer surprises. Ideally you want a programmer that understands your strategy and has quantitative trading experience. You then work together and...

The short answer is yes. Contracts and collaboration are how the world has progressed. I'm a software developer and full time trader. Have been doing this for years and I do work with others.

That looks like a trade that should have been filtered for one of many different reasons. For example, dark pool trades are often filtered out because they can trade thru NBBO and create those spikes you sometimes see. The exact combinations of trade conditions that cause trades to be filtered...

You can't look treat it like real money. You are simply focused on optimizing. Worrying about what the money could buy is a major distraction so make sure you don't care.

Major caveat: I'm referring only to entering/exiting positions for swing trades or long term positions. If you are day trading chart patterns then none of this applies. You will be timing your entry/exit points and will have to take whatever liquidity is available.

I'm not aware of any correlation to recent price activity but you could certainly study that as well. For an individual this is really only important for illiquid small caps where you may be buying or selling more than 0.1% of the daily volume. In these cases split your order into small pieces...

Are you asking why it works or are you asking how I know it works? I know it works through many test orders and measurement of my order fills. The reason it works can not be measured. It is likely a function of how other algorithms are choosing to provide liquidity. 100% of actual demand...

Running my algorithms is actually my full time job these days. Does that qualify as "running an algo shop"? Probably not. In any case my trades are going from the software to the broker without issue and have been for quite some time.