TL;DRThe price range established during the first hour of regular trading hours. A Market Profile concept used to assess the day's potential. Narrow IB suggests a trend day. Wide IB suggests a range day.
The initial balance (IB) is the price range from the first hour of RTH, specifically 9:30 to 10:30 AM ET for equity index futures. It captures the range that the first wave of institutional activity establishes.
The IB is a core Market Profile concept developed by J. Peter Steidlmayer. It provides a framework for anticipating what type of day the market is likely to have.
A narrow IB (relative to recent averages) suggests that the market has not yet decided on direction. This often leads to a breakout later in the session, resulting in a trend day where price moves far beyond the IB range.
A wide IB suggests that significant activity has already occurred in the first hour. This often leads to a range day where price stays within or near the IB for the rest of the session.
To determine whether an IB is narrow or wide, compare it to the average IB of the past 10-20 sessions. If today's IB is in the bottom 25%, it's narrow. Top 25%, it's wide.
Breakout traders watch for price to break above the IB high or below the IB low after 10:30 AM. A clean break with volume suggests a trend day is developing, and traders position in the direction of the break.
Fade traders look for failed breakouts. If price pokes above the IB high but quickly reverses back inside, this is an IB failure, and some traders will short with a stop above the failed breakout high.
The IB midpoint acts as a reference for mean reversion during range days. If the IB is wide and price drifts to one extreme, traders may look for a return to the midpoint.
Narrow IB leading to a trend day
ES IB range is 5,195 to 5,203 (8 points). The 20-day average IB is 18 points. This IB is in the bottom 20%.
At 10:45 AM, ES breaks above 5,203 with strong volume. Price runs to 5,240 by 2 PM without returning to the IB range. The narrow IB correctly signaled that the market hadn't made its move yet, and the breakout initiated a trend day.
Wide IB with a failed breakout
ES IB range is 5,180 to 5,210 (30 points). The 20-day average is 18 points. This is a wide IB.
At 11 AM, ES pushes to 5,215 (5 points above IB high) but immediately reverses to 5,207. This is a failed IB breakout. A fade trader shorts at 5,207 with a stop at 5,216 and targets the IB midpoint at 5,195.
Using a fixed point value to define narrow or wide IB
A 10-point IB on ES is narrow in a volatile market and wide in a calm one. Always compare to recent IB averages, not to an arbitrary number.
Trading the IB breakout without volume confirmation
Price can drift beyond the IB on low volume and immediately reverse. Wait for a break with above-average volume or strong delta before committing.
Not adjusting IB times for different products
IB is 9:30-10:30 ET for equity index futures. For CL, the equivalent concept uses 9:00-10:00 ET. Use the correct RTH open for each product.