Tags in TradeOnyx are user-managed labels you create in Settings → Tags & Playbooks. Each tag has a category — Setup ("London Open", "Asia range"), Mistake ("chased entry", "moved stop"), Psychology ("FOMO", "revenge trade", "calm"), or Custom (anything that doesn't fit the first three).
In the trade-detail modal, the tag picker is grouped by category for fast scanning. You can attach as many tags as the trade deserves — there's no limit and no ranking. The Trades tab can filter by any tag; the Overview tab's KPI tiles recompute on the filtered subset, the same way they do for playbook filters.
Tags vs. Playbooks: a playbook is the strategy you intended to execute; tags are the truth of what actually happened. A trade can carry the "Breakout-Pullback" playbook AND the "chased entry + FOMO" tag pair when the strategy was right but the execution was off. That separation is the whole reason both exist.
How to tag in a way that pays you back later: - Tag honestly, not retroactively flatteringly — the tag system has value only if your past self admitted what actually happened. "Calm + plan-followed" on every trade tells you nothing. - Mistake tags are the gold tier — they're the entries you'll filter the Trades tab by during a Sunday review. "Show me every trade tagged 'moved stop'" is the most actionable filter in the product. - Psychology tags reveal regime, not noise — "FOMO" appearing on 1 of 50 trades is a one-off. "FOMO" on 14 of 50 trades is a behavioural regime. The aggregate is the signal. - Custom is for the things you'll only ever know about your trading — "weekend gap", "earnings week", "pre-coffee". Don't underuse Custom — that's where the personal-edge tags live. - Three or four tags per trade is the sweet spot — one tag captures the dominant fact, three or four captures the texture. Ten tags per trade means you've stopped reviewing and started ritualising.
The signature workflow: at the end of every trading week, open the Trades tab, set the period to "this week", group rows by tag (or filter to a single mistake-tag), and read the bucket P&L. The week's worst tag is the leak you fix on Monday.
The second-order workflow: after twelve weeks, the most-frequent tag is your dominant trading personality. If "FOMO" leads, you trade fast markets badly. If "calm + plan-followed" leads, you trade well but maybe under-size. If "moved stop" leads, your stop discipline is your binding constraint, not your setup quality.
In TradeOnyx every tag carries audit history (TRA-90's audit-log architecture). Edit a trade's tags two months later and the platform records the change with timestamps. The reason: a trader who edits old tags to make past trades look more disciplined is the trader who can't fix the actual behaviour. The audit log keeps the original honest.