By Marco BösingWhat Is the Value Area?
The value area is the price range within the volume profile where approximately 70% of total traded volume for a defined period was transacted. It is bounded above by the Value Area High (VAH) and below by the Value Area Low (VAL).
The 70% figure is based on the concept of standard deviation around the Point of Control (POC). The value area defines the price range that the market accepted as fair value — within this zone, the majority of transactions occurred. Buyers and sellers agreed on these prices for 70% of all trades.
How Is the Value Area Calculated?
The calculation starts at the POC and expands symmetrically upward and downward:
- Start at the POC (the level with the highest volume)
- Add the volume of the next higher and next lower price level
- Include the level with the higher volume in the value area
- Repeat until 70% of total volume is reached
- The highest included level is the VAH; the lowest is the VAL
Mathematically, one standard deviation corresponds to exactly 68.2%. In trading practice, 70% is used because this is what most trading platforms implement and it has established itself as the practical standard.
The Value Area in Trading
Value Area as Context Indicator
The position of the current price relative to the prior-day value area provides an important contextual signal:
- Price within the value area: The market is in balance — rotational trading is likely
- Price above the VAH: The market is testing higher value — potential trend continuation or rejection
- Price below the VAL: The market is testing lower value — potential trend continuation or rejection
Value Area Migration
When the value area shifts upward or downward from session to session, this shows that the accepted fair value of the market is changing. Consistent upward migration points to an uptrend, downward migration to a downtrend.
Overlapping value areas between two sessions indicate balance and consolidation.
VAH and VAL as Key Levels
The VAH and VAL are standalone key levels:
- VAH as resistance: When rising out of the value area, the VAH can act as resistance
- VAL as support: When declining, the VAL can provide support
- Breakout: A sustained break through the VAH or VAL signals a value shift
Frequently Asked Questions
Which value area is most important?
The prior-day value area is the most important reference for intraday traders. For swing traders, the weekly and monthly value areas are more relevant. The composite value area over multiple weeks shows the higher-timeframe context.
Why 70% and not 50% or 80%?
The 70% is based on the concept of standard deviation (mathematically exactly 68.2%). In trading practice and across common platforms, 70% is used. This range defines the zone where buyers and sellers agreed on fair value — everything above is expensive for buyers, everything below is expensive for sellers.
Can I apply the value area to any timeframe?
Yes. The value area can be calculated for individual sessions, days, weeks, or custom periods. The longer the period, the more weight the resulting value area carries as a reference.