What is a high of day breakout?

A stock trading above its highest price so far that day. Momentum traders buy it as a sign that buyers have absorbed the sellers at the high and the move can continue.

Does the pre-market high count as high of day?

Traders differ. Many treat the pre-market high as the first level to beat on a gapper, and the regular-hours high after that. Scanners differ too, so check which one yours uses.

Where do you put the stop on a high of day break?

Under the consolidation that formed below the high, or a fixed distance under the level for a quick scalp. If the stock falls back under the old high and stays there, the break failed.

What is a high of day momentum scanner?

A scan that lists stocks making new highs now, often filtered for price, float and volume. It shows where momentum is right this minute.

Why do high of day breaks fail?

A large seller is waiting at or just above the level, the break comes on thin volume, the broad market turns, or the company sells stock into the strength. The stop is what limits the damage.

Glossary

High of day break

A high of day break is a stock trading above the highest price it has reached so far in the day. Momentum traders buy the break because every holder is at a profit, shorts are under pressure, and the stock shows up again on scanners that list new highs, which can bring a fresh wave of buyers.

Why it matters to a small-cap momentum trader

On a small cap in play, the high of the day is the level everyone is watching. Sellers who want out often rest their orders just under it, and buyers waiting for strength put their orders just over it. When the sellers at the high are taken out, the price can move several levels in seconds, because there may be little stock offered above. When they are not, the stock makes a double top and falls back, often fast. The break is a test of who has more size.

How it is traded

The level. The highest trade of the day so far. Traders differ on whether pre-market counts; on a gapper the pre-market high is often the first high of day that matters.

The setup. A consolidation just under the high, ideally holding above VWAP, with lows getting higher as the price presses the level.

Entry. As the offer at the high is taken and prints go through it, not before.

Stop. Under the consolidation low, or a set distance below the break for a fast scalp. A break that falls straight back under the level is the sign it failed.

On Level 2, a thick offer at the high that keeps refilling is a seller who has not finished. On the tape, a burst of large green prints at the ask as the level goes is the buyers winning.

High of day breaks in Hindsight Markets

The scanner can list stocks within a percent of their high or that made a new high in the last few minutes, and the Level 2 header shows the day's high beside the last price. The book and the tape at the moment of the break are the ones that really traded.

A worked example: the break and the stop

An illustration with made-up numbers, not a real stock or a real day.

The level. A stock's high of day is 8.50, set at 9:52. It pulls back to 8.18 and consolidates between 8.30 and 8.48 for ten minutes, with higher lows.

The trade. The offer at 8.50 is taken and prints go through. You buy at 8.52. Stop at 8.29, under the consolidation. Risk = 8.52 − 8.29 = 0.23 a share.

The size. To risk 150 dollars, 150 ÷ 0.23 ≈ 652 shares, rounded down to 650.

The outcome. If it runs to the 9.00 whole dollar, 650 × (9.00 − 8.52) = 312 dollars. If it fails and stops out at 8.29, 650 × 0.23 = 149.50 dollars lost, before slippage.

Common mistakes small-cap traders make with high of day breaks

Buying before the break. Buying at 8.48 to save a few cents takes every double top. Let the level trade first.
Chasing a break that already ran. If the stock is 0.30 past the level by the time you click, your stop is far away. Size down or pass.
Ignoring the offer. A large seller who keeps refilling at the high can absorb every buyer. Watch whether the size at the level is shrinking.
Forgetting the halt. On a low-float stock a fast break can reach its LULD band and pause. Know where the upper band is before you buy.

Common questions

What is a high of day breakout?: A stock trading above its highest price so far that day. Momentum traders buy it as a sign that buyers have absorbed the sellers at the high and the move can continue.
Does the pre-market high count as high of day?: Traders differ. Many treat the pre-market high as the first level to beat on a gapper, and the regular-hours high after that. Scanners differ too, so check which one yours uses.
Where do you put the stop on a high of day break?: Under the consolidation that formed below the high, or a fixed distance under the level for a quick scalp. If the stock falls back under the old high and stays there, the break failed.
What is a high of day momentum scanner?: A scan that lists stocks making new highs now, often filtered for price, float and volume. It shows where momentum is right this minute.
Why do high of day breaks fail?: A large seller is waiting at or just above the level, the break comes on thin volume, the broad market turns, or the company sells stock into the strength. The stop is what limits the damage.

How to practise it in Hindsight Markets

Open a past trading day and build a scan with Price vs. today's high within 1% and Minutes since today's high of 5 or less.
Draw a horizontal ray at the high and set a price alert a few cents under it.
As the price presses the level, watch the size offered at the high on Level 2 and the prints on the tape.
Buy the break with a hotkey and put the stop under the consolidation.
Open the trade in the journal and compare Most in your favour with Most against you.

Practice this on a real past day in Hindsight Markets

Replay a morning runner, watch the book and the tape as it presses its high, and practise the break with your own hotkeys.