Product·May 02, 2026·8 min read

Why drills, not videos.

A note on the design decision that shaped the entire platform: the smallest unit of TradeInTune is a chart you have to make a decision on, not a video you have to watch. Here's the cognitive science that forced our hand, and the product trade-offs we accepted to ship it.

When we started building TradeInTune, the obvious shape of the product was a video course. That is what every other player in the trading-education space sells, that is what learners expect when they search for "learn forex," and that is the easiest thing for a small team to ship. Record forty hours of content, gate it behind a price, watch the cards charge.

We did not ship that. We shipped drills. The smallest unit of the platform is not a four-minute video, it is a chart you have to make a decision on, with a real candle that just printed and a real outcome that follows. The reason is that everything we read about how skill is actually built said the video was the wrong unit, and we believed it more than we believed the conventional wisdom of the genre.

The starting point was Roediger and Karpicke's 2006 testing-effect work. They had college students study short prose passages under two conditions: re-read the passage four times, or read it once and take three free-recall tests. Five minutes after the final session the re-readers performed slightly better. One week later the test-takers performed significantly better. The act of retrieval, even with no feedback, had cemented the material in long-term memory in a way that re-reading had not. Adesope's 2017 meta-analysis pulled together two hundred and seventy-two effect sizes and confirmed it across age groups, subjects, and retention intervals. Practice testing produced an effect size of around 0.61, which moves the average student from the fiftieth to the seventy-third percentile.

The applied version of this is brutal for video courses. Watching a video of someone explaining a setup is, neurologically, closer to re-reading than to retrieval. It produces a feeling of fluency, because the explanation is right there in front of you and it makes sense, and that feeling decays within a week. By the time you sit down at a real chart and try to recognise the setup yourself, you do not have a memory trace built from retrieval. You have an impression of having understood, which is not the same thing.

So we built the unit of work around retrieval. A drill in TradeInTune is a real chart, a real moment in price action, and a question you have to answer with no hint and no host walking you through it. You commit to a decision. You see the outcome. You get feedback in the form of "this is what actually happened next, and here is why." The retrieval is forced. The encoding is durable.

The product trade-offs we accepted to ship this are real. Drills are harder to build than videos. Each one requires real OHLC data, a curated moment, a question that has a defensible answer, an explanation, and follow-up content that uses the same chart. A forty-hour video course can be recorded in three months. A 123-lesson drill curriculum took us substantially longer, and the work continues. The economics only make sense if you believe, as we do, that the durable skill produced is worth the multiplier in build cost.

We also accepted that drills feel harder for the learner. A video lesson generates almost no friction. You watch, you nod, you move on. A drill demands a decision. You have to commit before you see the answer. The first month on the platform, learners report finding it more uncomfortable than the courses they had used before. Within four to six weeks, the same learners report being able to recognise live setups they would have missed before. The discomfort was the work.

That is the design philosophy. Drills, not videos. Retrieval, not absorption. Make the moment of forced commitment the unit of the product, and the durable skill builds itself in the background.

Jack Mackie

Founder · TradeInTune