So You Want to Be a Day Trader?
David MartinObservations on intraday market behaviour, structure, and context — explored through data, not prediction.
| Platform |  | Pricing | Freemium | Publishes | Daily |
|---|---|---|---|---|---|
| Issues | 1342 | Founded | 3 years ago | Last Issue | 3 days ago |
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Cut your position size in half
Whatever you were about to trade, trade half of it.
That’s the whole lesson. But here’s why it’s saved me more money than almost anything else I do, because it runs directly against every instinct you’ll have when a setup looks good.
Here...
When the US500 Asia session collapses, does the selling keep going — or wash out?
In this sample of deep overnight drops, the selling mostly didn’t extend: the same-day London-through-US leg closed positive 9 of 14 (median +22 pts), and the following day finished positive 11 of 15 (median +43 pts).
When the US500 Asia s...
The S&P just gapped down and stayed heavy after an up day — what’s historically followed?
Today (Monday 13 July 2026) the US500 futures session opened more than 10 points below the prior close and was still down 5 or more two hours in — despite the prior day finishing higher.
Today (Monday 13 July 2026) the US500 futures sessio...
Charts are Overrated
This one is going to annoy a lot of people. Possibly you. That’s fine.
For most retail traders, the chart is the job. Open the screen, stare at the candles, draw a few lines, wait for a pattern, pull the trigger. It’s so universal that que...
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Authors
The writers behind this newsletter.
Intraday market structure, quantified. I analyse index behaviour across sessions, events, and regimes, turning history into data and probabilities. Founder of Mosaic, an intraday data and AI platform for serious traders.
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