The 8 Bar Narrow Range (8BNR) is a technical trading pattern developed by Toby Crabel, introduced in his book "Day Trading with Short Term Price Patterns and Opening Range Breakout".
It is part of his framework of price action patterns that focus on periods of volatility contraction (narrow price ranges) as precursors to potential volatility expansion (significant price movements). Here's an explanation of what the 8BNR pattern suggests and its implications for traders:
The 8BNR pattern occurs when the 8-day range (the difference between the highest high and the lowest low over an 8-day period) is the narrowest range compared to any other 8-day period within the last 40 trading sessions. This indicates a period of low volatility or price consolidation, where the market has been trading in a relatively tight range over the past eight days compared to recent history.
The 8BNR signals a potential breakout, but it does not specify the direction. Traders often use the pattern in conjunction with Crabel’s ORB strategy:
Long Trade: Place a buy stop order at the open price plus the "stretch" (a calculated value based on the 10-day simple moving average of the smaller difference between the open and high/low).
Short Trade: Place a sell stop order at the open price minus the stretch.
Short Trade: Place a sell stop order at the open price minus the stretch.
Crabel’s research suggests that breakouts are more likely to be profitable if they occur early in the trading session. Trades triggered later in the day carry higher risk and may warrant smaller position sizes or avoidance of overnight holds. The 8BNR is more reliable when it occurs after a clear trend or during a pullback in a trending market. Multiple narrow range patterns in close proximity (e.g., consecutive NR7 or 3BNR, 4BNR, 8BNR days) may indicate congestion, reducing the reliability of the breakout.
Like all technical patterns, the 8BNR is not foolproof. False breakouts, market noise, or unexpected events can lead to losses. Traders should avoid mechanical application and incorporate additional technical or fundamental analysis to confirm signals. Always combine the pattern with other market analysis for best results.