Inside Bar in forex: definition
An Inside Bar is a simple price-action pattern made from two consecutive candles. The inside candle has a high that is lower than (or equal to) the previous candle’s high, and a low that is higher than (or equal to) the previous candle’s low. In other words, the inside candle’s full range is contained within the prior candle’s range.
This is a mechanical, observable rule based only on candle boundaries (high/low). It does not require any indicator values. Because it is purely descriptive, it is helpful for checking how price behaved around the prior candle’s extremes.
How Inside Bar works (a simple model)
A basic way to think about Inside Bar is range compression: the market prints a smaller trading range after a prior candle, suggesting reduced movement during that interval.
A common interpretation is to pay attention to the levels defined by the prior candle’s high and low, since the Inside Bar itself “fits” between them. If price later moves outside that prior range, traders often describe it as a range expansion.
Example with explicit assumptions
Assume one candle spans a fixed time period (for example, a 1-hour chart), and you are working with pip-based price quoting.
- Candle A (the “parent”) has High = 1.2000 and Low = 1.1950.
- Candle B (the “inside”) has High = 1.1980 and Low = 1.1960. Because 1.1980 < 1.2000 and 1.1960 > 1.1950, Candle B is an Inside Bar relative to Candle A.
At this point, the pattern tells you about the relationship between ranges, not what will happen next.
Distinguishing it from nearby concepts
Inside Bar is sometimes grouped with other “consolidation” ideas, but it is best kept distinct:
- Inside Bar vs. volatility indicator behavior: Inside Bar is a candle-structure rule; an indicator (like any volatility measure) is a separate tool that may suggest compression, but it is not the definition.
- Inside Bar vs. breakout signals: The pattern alone does not specify direction. It only describes that the second candle is contained within the first.
- Inside Bar vs. multi-candle patterns: Variations may use more than two candles, but the core Inside Bar concept is specifically two-candle containment.
If you see an explanation that claims direction is certain, that typically goes beyond what the definition itself guarantees.
Limitations and risks
Inside Bar can be useful for organizing what price did, but several material limitations affect outcomes:
- False expansions: After an Inside Bar, price can break beyond the prior candle’s high/low and then quickly return, creating what is often called a false move.
- Transaction costs and execution effects: Real trading involves spreads, commissions, and slippage. These can matter especially when key levels are close to each other.
- Market context uncertainty: A candle pattern is not the full market story. Liquidity conditions, scheduled events, and broader trend behavior can change how often “range expansion” leads to follow-through.
- Time-frame sensitivity: What is an Inside Bar on one chart period may not be an Inside Bar on another, because candle construction changes.
Because of these factors, historical observations of Inside Bar outcomes do not establish future results, and any backtest depends on assumptions like execution rules and cost modeling.
Verification and next questions
To independently verify the pattern:
- Identify two consecutive candles.
- Check that the inside candle’s high is at or below the previous high and its low is at or above the previous low.
- Record the chart time frame and the exact candle data used.
If you want to go further, a good next question is: How is the pattern being used—strictly as a descriptive range-compression label, or as part of a rule set that defines conditions for decisions? That distinction determines what can be checked objectively from price data.