Direct Answer
The previous week's high and low are the highest and lowest prices traded during the prior calendar or trading week. They are carried forward as reference levels for the current week. Price outside the prior week's range means the current week has moved beyond last week's extremes.
Previous Week High/Low: Formula, Meaning, Signals, Examples and How to Use It
How Is Previous Week High/Low Calculated?
The previous week's high and low are the highest and lowest prices traded during the prior calendar or trading week. They are carried forward as reference levels for the current week.
Formula: PWH = high of the previous week; PWL = low of the previous week; midpoint = (PWH + PWL) / 2
Inputs:
- Weekly high and low of the prior week
- Week definition (calendar or trading week)
Worked example. A previous-week high of 112 and low of 100 have a midpoint of 106.00. The inputs are illustrative numbers, not market data.
Reading it. Price outside the prior week's range means the current week has moved beyond last week's extremes. The weekly range provides a wider frame than the previous-day levels.
Limits. Definitions of the week boundary differ across markets (24-hour markets in particular), so values can vary by source. Extremes can reflect one brief spike.
What is Previous Week High/Low?
The previous week's high and low are the highest and lowest prices traded during the prior calendar or trading week. They are carried forward as reference levels for the current week.
How to use Previous Week High/Low
Price outside the prior week's range means the current week has moved beyond last week's extremes. The weekly range provides a wider frame than the previous-day levels. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime.
Strengths
- Spanning a full week, the levels summarize about five sessions and are less affected by one day's noise than daily levels.
- The weekly midpoint gives the center of the prior week's span, a simple reference computed from just two numbers.
- Reproducible when the formula and data convention are fixed.
Weaknesses and limitations
- Weekly levels update once per week, so they stay fixed through the week and can end up distant from price after a large move.
- A holiday-shortened week holds fewer sessions, narrowing the range and making its levels less comparable with a full week's.
- Correlated indicators can create false confidence by repeating the same underlying information.
Editorial and risk note
This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance.
Frequently Asked Questions
Is Previous Week High/Low a buy or sell signal?
No. Price outside the prior week's range means the current week has moved beyond last week's extremes. Definitions of the week boundary differ across markets (24-hour markets in particular), so values can vary by source. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions.
What is the best setting for Previous Week High/Low?
Previous Week High/Low is computed from weekly high and low of the prior week; week definition (calendar or trading week), so the choices that matter are the data convention and the window it is read over. Test those across instruments, regimes and out-of-sample periods instead of fitting one historical winner.
Can Previous Week High/Low be used by itself?
Definitions of the week boundary differ across markets (24-hour markets in particular), so values can vary by source. Extremes can reflect one brief spike. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone.
Does Previous Week High/Low work on every timeframe?
The calculation (PWH = high of the previous week; PWL = low of the previous week; midpoint = (PWH + PWL) / 2) can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it.
Why does Previous Week High/Low give false signals?
Weekly levels update once per week, so they stay fixed through the week and can end up distant from price after a large move. A holiday-shortened week holds fewer sessions, narrowing the range and making its levels less comparable with a full week's. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated.
How should Previous Week High/Low be backtested?
Rebuild Previous Week High/Low from weekly high and low of the prior week using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline.