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Gap and go, bull flags, ABCD

The classic momentum patterns on real-looking charts: where the entry is, where the stop goes, and what volume must confirm.

Three patterns, one idea

Every pattern on this page is the same story told at different moments: a stock surges on real buying, rests briefly while weak hands sell, then continues when buyers prove they are still in control. The entry is never during the surge and never during the rest. It is at the exact moment the rest ends.

Not advice. These are simulated charts built to show textbook shapes clearly. Real charts are messier, entries can fail, and pattern trading loses money without the risk rules covered in risk and psychology.

The gap and go

A stock gaps up on overnight news and keeps going. The trigger most traders use is the break of the premarket high in the first minutes after the open, with volume expanding on the breakout candle. If the open drives down instead, there is no trade. The plan dies with the trigger, not with a feeling.

The bull flag

After a sharp vertical move, the pole, price drifts sideways or slightly down on shrinking volume. That drift is the flag. The entry is the break of the flag's high, the stop goes just under the flag's low, and volume must come back in on the breakout candle. A flag that retraces more than half the pole, or drifts on rising volume, is not a flag. It is distribution.

A bull flag on simulated 5-minute candles: pole on heavy volume, a light-volume drift, then the breakout. The marker shows the entry and the dashed red line the stop under the flag low. Blue is VWAP.

Notice where VWAP sits. Momentum traders treat the volume-weighted average price as the session's line in the sand. Above it, buyers who bought the average are in profit and dips get bought. A flag that holds above VWAP is the strong version of the pattern. A stock that loses VWAP has lost the session's buyers, and longs step aside.

The ABCD pattern

The beginner-friendly version of the same continuation logic, named for its four points. A is where the move starts, B is the first peak, C is the higher low that forms when the pullback holds above A, and D is the entry as price breaks back over B. The height from A to B projects the target above D.

The four points marked on the chart. The pattern fails if C breaks below A, which is exactly where the stop belongs.

When the party ends

  • Extension. A stock that is up several hundred percent in days has less and less fuel. Late continuation patterns fail more often.
  • First red day. After a multi-day run, the first day that closes firmly red often marks the top for a while. Momentum longs stop looking for flags on that day.
  • Low volume breakouts. A breakout candle without a volume push is a trap more often than a trade.

A real one: GameStop, January 2021

The most famous momentum stock of the decade did everything on this page inside three weeks, then took most of it back. Gap and go days during the run, a parabolic extension into the top, and a first red day that marked the end. The chart uses a log scale because the move is too big for a normal one. Whenever a pattern page makes momentum feel safe, this chart is the correction.

GameStop daily chart of the January 2021 squeeze on a log scale
Real GameStop daily candles, December 2020 to March 2021, split-adjusted Yahoo Finance data on a log scale.

Watch the levels with CryptoAlertly

  1. Found a flag forming on a coin or stock you track? Set a price alert just above the flag high. The email is your signal to open the chart and judge the breakout volume yourself.
  2. Set a second alert under the flag low. If that one fires first, the setup is dead and you saved the entry.
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Educational content, not financial advice. Chart patterns and strategies are hints, never guarantees. Markets are risky and nothing here is a recommendation to buy or sell anything. Never invest money you cannot afford to lose.