Dark Cloud Cover

The Pattern

A Dark Cloud Cover forms over two consecutive bars:

1. An up-bar continues an existing uptrend.
2. The next bar opens at or above the prior bar’s high, then sells off and closes below the midpoint of the prior bar’s body but above the prior bar’s open.

The second bar penetrates back into the up-bar’s territory without fully engulfing it. The closing requirement (below the midpoint, above the open) is the threshold the classical reading insists on.

The Story Behind It

The bullish session created a price high and the opening gap up extended that optimism, but sellers stepped in hard enough to push price back into the prior session’s body and close below its midpoint. The classical reading treats the midpoint cross as the binary threshold: closing back through it indicates the bullish session’s price control has been meaningfully eroded, even if not completely flipped.

In the literature Dark Cloud Cover is often presented as the bearish counterpart to Piercing Line. Both are “half engulfings”, and both occupy the same conceptual slot between weak (Harami) and strong (Engulfing) reversal signals on their respective sides.

When It Tends To Work

• After a clean, multi-bar advance where the up-bar was a continuation rather than an isolated push.
• When the gap-up open is meaningful, ideally into a previously held resistance level.
• When the close not only crosses the midpoint but reaches into the lower third of the prior bar’s body.

When It Tends To Fail

• When the down-bar barely pierces the midpoint. Marginal breaks of the threshold have weaker history than firm ones.
• In equity index futures where the dip-buy reflex frequently negates the bearish setup within the hold window.
• At fresh all-time highs where the gap-up open reflects continued accumulation rather than exhaustion.

How This Strategy Trades It

Enter short at the close of the dark cloud cover bar. Hold for hold_bars sessions (default 5), then flatten unconditionally.

Related Patterns

• Piercing Line: the directional mirror.
• Bearish Engulfing: the stronger version, the down-bar closes below the prior open rather than just below the midpoint.
• Bearish Harami: a weaker two-bar reversal, body inside body instead of body crossing through body.

Try It Yourself

The default preset uses 1-contract sizing on NQ daily bars. The form lets you change the contract, timeframe, hold length, and contract count.