The margin is two cents. The calculation applied within orb trading nasdaq brandedvideo differs from standard textbook models when analyzing the gap to range ratio during the nasdaq session. A high premarket gap followed by a tight opening range often signals a violent expansion after the initial volatility subsides. This specific relationship between the overnight session move and the subsequent price action dictates the probability of a successful opening range breakout.
Defining the Gap to Range Ratio
The math begins with the distance between the previous day closing price and the current market open. This premarket move establishes the initial momentum. The second variable is the size of the opening range, typically measured during the first fifteen minutes of regular trading hours. A ratio is calculated by dividing the gap size by the range size. A high ratio suggests the gap is large relative to the initial volatility, which often leads to a trend continuation or a mean reversion trap. A low ratio indicates the gap is small compared to the initial price swing, suggesting a lack of clear directional conviction at the cash open.
Measuring the Opening Range
The timeframe chosen for the measurement changes the signal strength. A five minute range provides high frequency data but produces significant noise. A fifteen minute range offers a more stable baseline for calculating the ratio. Most mechanical systems look at the thirty minute range to confirm the direction. The session high and session low established during this period act as the boundaries for the trade. The ratio must be calculated using the absolute price difference between these two points. A small opening range relative to a massive overnight session move often results in a squeeze.
Volatility Expansion Mechanics
Expansion occurs when the price breaks the boundaries of the opening range after the ratio reaches a specific threshold. If the gap is large and the fifteen minute range is narrow, the energy from the overnight session is compressed. This compression leads to a breakout. The direction of the breakout often aligns with the side of the gap. If the price stays within the range for the first hour, the expansion is delayed. A failure to break the range after a high ratio period often leads to a chop within the session high and low limits.
Execution Parameters
Mechanical entries happen at the breach of the opening range. The stop loss sits at the opposite side of the range. The target is based on the projected expansion derived from the gap size. A large gap provides a larger mathematical target. The ratio provides the filter to avoid low probability setups. A tight range following a massive gap is a high probability setup for a trend day. A wide range following a small gap is a low probability setup for a breakout.