Evaluating bullish engulfing with context filters

What counts as a bullish engulfing

A bullish engulfing pair is a bearish candle followed by a bullish candle whose body covers the first, opening below the prior close and closing above the prior open. Here that candlestick engulfing condition is a two-bar OHLC structure treated as a candidate long setup after a decline, not as a completed trade.

The same pair after a decline

The same two-bar structure is treated as more informative after a decline, because it can mark the end of a selloff rather than a pause in an already-rising market. The coded procedure searched for the pattern during a downtrend and used a prior local high from Nmax days earlier as a candidate take-profit reference. Nmax is the lookback, in trading days, to that prior local high.

A rule-based entry instead of a later confirmation

A rule-based entry states when to enter, skip, or exit so the same engulfing condition can be compared across market contexts. Unlike a confirmation entry that waits for a later close above the pattern high, this procedure bought the next open after the engulfing pair in order to generate more observations.

The historical workflow also applied sample filters before that open was taken. It required a minimum last-day volume, limited price to a bounded range, used a fixed allocation per entry, and stood aside when a shorter simple moving average sat below a longer simple moving average on the name or on the broad index.

How the stop-loss was measured

A stop-loss is a pre-planned exit that bounds loss if the reversal thesis fails. Three protective-exit placements were compared in the same procedure: a fixed price offset, a multiple of recent average true range, and a wider multiple of that range. Average true range is used here to place the protective exit at a multiple of recent typical range rather than a fixed point distance. A mid-width range multiple was kept for later context tests.

Nearby selling the pair still has to survive

An unfilled downward gap between the prior local high and the engulfing pair was associated with weaker comparative sample outcomes and longer typical holds than the same pattern without that gap.

A long down-bar on the path from the prior local high to the engulfing pair, illustrated as the longest body among the most recent sessions, was associated with weaker comparative sample outcomes than the pattern without that precursor.

When the second body was several times longer than the first, comparative sample measures favored the more dominant second bar, though that shape was not treated as a sole requirement.

How close the prior swing sits

A prior high that sat close in time, or a take-profit only a small distance above the prior close, was associated with shorter holds. The write-up treats the pattern as better matched to short-horizon trades.

Editorial interpretation: how close that prior swing sits is part of whether the two-bar structure still counts as a candidate entry, not a detail added after the pair is already treated as a signal.