The first three practice decisions of a session are often leftovers from the last one. You are still fighting yesterday’s index grind, or still hunting the breakout you did not take at 9:40. That is stale bias. It feels like preparation. It is actually a hangover.
A warm-up is not stretching, meditation theatre, or reading three Telegram views of “how Nifty looks.” It is a timed drill that makes yesterday’s unfinished story unusable before you spend today’s decision budget.
What you are calibrating
You are not warming up “the market.” Historical replay does not care that you are cold. You are warming up you:
- Which window of the NSE day you are allowed to practise
- Which setup is in play (one, not five)
- Which error from the last log you refuse to repeat
- Whether you can describe the current tape without importing a story from a different day
Hidden dates help, but they do not automatically clear bias. You can still project “this feels like a trend morning” onto a randomised start. The warm-up’s job is to catch that sentence before it becomes an entry.
CLEAR-10 (ten minutes, no extra)
Timer on. Phone face down. Chart on the practice instrument only — a liquid large-cap or index future you actually use as a generic tape, not a tip.
Minute 0–2 — Conditions. Write three lines: product (intraday cash / swing delivery / other), session window (open / midday / last hour), max decisions for this sitting. If you cannot write the window, you are about to practise “the whole day,” which is how warm-ups get skipped and sessions get sloppy.
Minute 2–4 — Levels, frozen. Mark the levels you are allowed to care about from information already visible at the start of the replay (prior day high/low, a pre-defined range, a round figure you treat as a hypothesis). Then freeze them. No moving a line because the first five-minute bar “looks important.” If you need a longer method for this, steal the discipline, not the whole article, from level work — the warm-up only needs a freeze.
Minute 4–6 — Error from last session. Open yesterday’s log. Copy one failure tag into today’s header (peeked, stop-after-click, midday-invented-setup, chased-third-break). Circle it. That tag is the only improvement target for this sitting.
Minute 6–8 — Anticipate without predicting. Complete this sentence: “If the next hour is chop, I will ___ ; if it is a clean drive, I will ___ .” The blanks must be rule references (skip, wait for retest, no trade after two losses), not market forecasts. Forecasting is how confirmation bias gets a head start.
Minute 8–10 — Rules freeze and first skip. Read the written rules once. Take a deliberate skip on the first bar that looks tempting but does not meet criteria — or skip because nothing meets criteria. Log it. You have now practised a decision before the “real” session mood takes over.
If minute 10 arrives and you have not frozen levels or copied an error tag, you do not extend the warm-up. You abort the sitting. An uncalibrated session teaches the hangover.
What CLEAR-10 exposes (that scrolling does not)
Stale bias shows up as specific tells during minutes 6–8:
- You write “trend day” before a single replay bar has printed
- You move a level you froze in minute 3 because the open “looks like last Thursday”
- You cannot name last session’s error without opening the blotter — meaning you were going to repeat it on autopilot
- Your anticipate-sentence is a price target, not a behaviour
Those tells are the point of the drill. Catch them in a notebook, not in a forced entry at 9:21 of a historical open.
What is not a warm-up
- Reading a finished daily chart of the same name you are about to replay (hindsight with extra steps)
- Scanning six F&O names “to get a feel” (watching is not practising)
- Reliving the live 9:15 open you already saw at the office, then starting replay on the same day — you are not hidden-date practising; you are rehearsing a memory
- A twenty-minute indicator ritual that delays the first committed decision
NSE structure still matters: an opening-window session should warm up with opening rules, not last-hour square-off rules. Mixing windows inside CLEAR-10 is how you practise two products by accident.
Failure modes
Warm-up as delay. You polish levels for eighteen minutes because you do not want to commit. Cap is ten. Start replay ugly if you must.
Error tag tourism. You pick a flattering error (“was a bit late”) instead of the one that actually scored 0. Use the log, not the ego.
Skip skipped. You treat minute 8–10 as optional. The first skip is the calibration. Without it, the first decision is still yesterday’s.
Live bleed. You warm up on replay then immediately size live because you “feel ready.” Warm-up readiness is not a live-capital signal.
Run CLEAR-10 for ten sittings. If your first-three-decision process scores rise relative to the rest of the session, keep it. If they do not, the hangover is not the first ten minutes — it is the rules, the window, or fatigue. Do not add a second warm-up. Change the sitting.
Run CLEAR-10 before the next hidden-date replay and log the first skip. Join the waitlist.
Related reading
- How Long Should a Chart Replay Practice Session Be?
- Why Hidden Dates Make Trading Practice More Honest
- Confirmation Bias on Charts: How Replay Helps
- NSE Market Timings and How to Structure Practice Around Them
Educational note
Educational practice content only. Not investment advice. No guaranteed returns. Practice ≠ live profitability.