By Marco BösingWhat Are Session High & Low?
Session high and low refer to the highest and lowest prices reached within a defined trading session (e.g., the regular US session, the Asia session, or the London session). These extreme points are far more than statistics. They mark zones where significant concentrations of stop orders and liquidity accumulate.
Why is that? Because the majority of traders place their stop-loss orders at obvious levels. And the most obvious levels are the extremes of a session. Everyone sees the daily high. Everyone sees the daily low. And that is exactly where the stops pile up.
Institutional participants frequently use session extremes as reference points for entries and exits. When a session high or low is broken, it can either signal a genuine breakout or trigger a stop run, where liquidity above or below the extremes is swept before the market reverses. Understanding session highs and lows is a fundamental building block for analyzing market structure and liquidity flows.
Why Are Session High & Low Important?
The significance of session highs and lows goes well beyond simple support and resistance logic. It is about liquidity. When the market reaches a session high and then falls, many traders place their stops just above that high. Long traders set profit targets there. Short traders set stop-loss orders there. The result: a pool of orders sitting above the session high that acts like a magnet for price.
I see the same pattern over and over: price runs to the session high, briefly breaks through it, and then reverses. What happened? The stops were triggered, the liquidity was absorbed, and the real move begins in the opposite direction. This is not coincidence. It is a direct result of how markets function. Large positions need counterparty liquidity, and that liquidity sits at the obvious levels.
At the same time, session highs and lows provide context for market structure. When the Asia session forms a high and the London session sweeps it, that tells a story. When the US session then sweeps the London session low, that tells a different story. This sequence of liquidity sweeps across sessions paints a picture of who is currently in control.
Practical Application
A typical scenario for the Nasdaq: the Asia session forms a tight range with a clearly defined high and low. The London session opens, sweeps the Asia high, and price falls back. Then the US session opens and price falls further, sweeping the Asia low. At that moment, you need to ask: was that a genuine breakout to the downside, or was it a stop run on the Asia low?
The answer often lies in the price reaction after the liquidity sweep. If price takes the session low and immediately reverses aggressively upward, you probably witnessed a stop run. If it pushes through the low with sustained momentum, it is more likely a genuine breakout. Recognizing this difference is the key.
In my own trading, I mark the session highs and lows from previous sessions at the start of each day. These are my primary reference points. Not because I always trade at these levels, but because I need to know where the liquidity sits. Where liquidity sits, price will be drawn. Read more in the full article on session high & low trading.
Common Mistakes
Trading every session high break as a breakout. Many traders see price go above the daily high and immediately jump in long. But very often, that is exactly the stop run that sweeps the liquidity before the market reverses. Always wait for the reaction after the break.
Looking at session levels without context. A session high alone says very little. You need to know which session formed that high, what the dominant trend looks like, and whether significant liquidity actually sits at that level. Without this context, you are trading blind.
Marking too many session levels. If you mark the extremes of every single micro-session, you end up with a cluttered chart. Focus on the major sessions: Asia, London, US. That is enough.
FAQ
Which session highs and lows matter most?
The US session extremes carry the most weight because they see the highest volume. London session comes next. The Asia session high and low are particularly relevant as early reference points because they often define the targets for the subsequent sessions.
How do I distinguish a real breakout from a stop run at a session high?
Watch the reaction after the break. A genuine breakout shows sustained momentum and volume in the breakout direction. A stop run shows a rapid reversal, often in the form of a failed structure. The speed and volume of the reversal tell you what really happened.
Should I use session highs and lows as entry levels?
Not as blind entry levels, but as zones where you look for confirmation. If price reaches the session low and shows signs of reversal, that is a good spot for a long entry. But the break of the level alone is not a trade signal.