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AI-Powered Market Intelligence
Understand the reason behind any stock move.
Quantify pre-open momentum before regular session starts.
AI-Powered InsightsReal-Time DataNo Noise. Just Clarity.
Pre-Market Move Calculator
Calculate pre-market move from previous close.
Measure off-session sentiment by comparing pre-market price with prior regular-session close.
Results
Pre-market move
+3.16%
Pre-market change is +$3.00 (+3.16%).
- Previous close
- $95.00
- Pre-market price
- $98.00
- Absolute move
- +$3.00
Formula
Pre-Market Move % = ((Pre-Market Price - Previous Close) / Previous Close) × 100
Example
- Previous close: 95
- Pre-market price: 98
What does this mean?
- •Pre-market moves are often catalyst-driven.
- •Liquidity can be thin outside regular hours.
- •Confirm with regular-session follow-through.
Read pre-market direction fast
Quantify pre-open momentum before regular session starts.
What is a pre-market move?
Measure off-session sentiment by comparing pre-market price with prior regular-session close. In practice, this means you can quantify pre-market move using previous close, and pre-market price without relying on hidden assumptions or black-box scoring.
Primary input set for this calculator: Previous close, Pre-market price.
How to calculate pre-market move
- 1.Step 1: Enter previous close with the timeframe/context you want to evaluate.
- 2.Step 2: Enter pre-market price with the timeframe/context you want to evaluate.
- 3.Step 3: Apply formula Pre-Market Move % = ((Pre-Market Price - Previous Close) / Previous Close) × 100.
- 4.Step 4: Interpret output together with risk, liquidity, and catalyst context.
Why this metric matters
This metric standardizes raw price action so you can compare moves across different tickers, sessions, and catalyst windows.
Pair this calculator with catalyst context from headlines, filings, and options flow to avoid relying on isolated numbers.
When to use this calculator
- ✓Before opening a new position where pre-market move impacts sizing or risk.
- ✓After a catalyst to quantify how much conditions changed versus your baseline.
- ✓When comparing setups across multiple tickers with one consistent formula.
- ✓During weekly review to keep decision-making tied to measurable inputs.
Common scenarios
Pre-market moves are often catalyst-driven
Use this pre-market move workflow to quantify this scenario with deterministic inputs.
Liquidity can be thin outside regular hours
Use this pre-market move workflow to quantify this scenario with deterministic inputs.
Confirm with regular-session follow-through
Use this pre-market move workflow to quantify this scenario with deterministic inputs.
Event reaction review
Recalculate pre-market move immediately after earnings, filings, or macro headlines.
Interpretation tips
- •Re-run pre-market move whenever key inputs change materially, not only when price moves.
- •Document assumptions so the same methodology can be repeated across watchlist names.
- •Use this metric as one layer in the decision stack, not as a standalone trade trigger.
Data caveats
- –Outputs are deterministic from your inputs; input quality determines output quality.
- –This page does not auto-adjust for broker fees, taxes, or slippage unless you include them in your assumptions.
- –Validate corporate action details, filing dates, and data freshness before acting on results.
FAQ
How does the pre-market move calculator work?
Pre-Market Move Calculator is deterministic and uses only your inputs (previous close, pre-market price). Formula: Pre-Market Move % = ((Pre-Market Price - Previous Close) / Previous Close) × 100.
What does this output tell me in practice?
Calculate pre-market move from previous close. Pair this with a stop-loss and thesis review, not just return math.
Does the pre-market move calculator use real-time market feeds?
No. This page does not auto-pull live data. You control all inputs and can rerun instantly as market conditions change.
Can I use this result directly for trading decisions?
Use it as a planning layer. Combine with position sizing, liquidity, and catalyst context before any execution.
Related tools
After-Hours Move Calculator→Gap Up / Gap Down Calculator→Stock Percentage Move Calculator→Earnings Move Calculator→
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