Darrell Martin coined the phrase "diagnostic investing" which he defines as looking at how fundamental investors, technical investors, statistical investors, and seasonal investors look at the market and then using that knowledge to help establish an investing plan more accurately. His trading doctrine relies on research-based quantitative trading methods and forward thinking.

Mr. Martin has designed multiple algorithm-based trades. He has also designed unique patterns and indicators for investing and trading such as the apex pattern – which he applies to all time frames on all markets – a volatile trend line indicator, and a choppy market warning indicator that uses the securities underlying options to help alert traders to upcoming choppiness in various markets.

He grew Apex Investing from a desire to record what he had learned for his daughter to a community of 30,000 traders. He then set out to change the funding space with simple rules: encourage skilled traders that don’t have the capital, or a desire to risk the capital, to be able to trade the futures markets. Within a short time, his company, built by traders for traders, has become the largest futures funding company in the USA with thousands passing evaluations each month and millions paid out to traders this year.