Anchoring bias in trading

What anchoring bias is

Anchoring bias is the habit of relying too heavily on an early piece of information, called the anchor, when you judge something later. The anchor may be irrelevant, but your later estimate still stays close to it.

Psychologists Amos Tversky and Daniel Kahneman described this as "anchoring and adjustment." In their experiments, people were shown an arbitrary value from a random device and then asked a factual question. Their answers moved toward the random value even though it had nothing to do with the question. People adjusted away from the anchor, but not far enough.

Markets give you anchors all the time. Your entry price, a recent high, a round number and the price you "should have" bought at are all common examples.

How anchoring shows up in trading

Fixation on the entry price

The market does not know your entry price. Still, many traders treat it as a line that matters. They hold a losing position "until it gets back to break-even," or they close a winner too early because it is "far enough above where I bought." The entry price becomes the measure of the trade, instead of what the chart and the news show now.

This links closely to loss aversion and the disposition effect, which is the tendency to sell winners too early and keep losers too long.

Past highs and lows

A trader who saw gold or an index at a higher level may treat that level as the "real" price and see anything below it as cheap. Studies of stock returns have found that investors react differently when prices are near their past highs, which is consistent with anchoring on those levels. An old high is information about the past. It is not a target the market owes you.

Round numbers and other people's levels

Round prices, analyst targets and levels from a video or chat group can all become anchors. Once you hear a target, it is hard to un-hear it. For more on outside influence, see social media hype.

Why it costs money

Anchoring can lead you to widen or remove stop-losses, add to losing positions, or skip valid exits. With leveraged CFD and forex trading, losses can grow fast. Holding a position because of an anchor can turn a small, planned loss into a large one.

Reframing: practical exercises

These exercises do not make you profitable. They are ways to reduce a known decision error.

• The fresh-eyes test. For each open position, ask: "If I had no position here, would I open this trade now, at this price, with this stop?" If the answer is no, your reason for holding may be the anchor.
• Hide the entry price. Some platforms let you change the chart display. Look at the chart without your entry line and describe the market in writing before you look at your profit or loss.
• Write exits before entry. Define the stop-loss, the target and the reason for the trade before you open it. Change them only for a reason you can write down that does not mention your entry price. See risk management.
• Name the anchor. In your journal, note which price was on your mind when you made each decision. Over time, you will see which anchors repeat.
• Use ranges, not single numbers. Instead of "price will return to the high," write scenarios: what would make the trade wrong, and what you would do then.
• Review the process, not the result. Judge whether you followed your plan, not whether the trade made money. See process vs outcome.

Related biases

Anchoring often works together with other biases. Confirmation bias makes you look for news that supports your anchor. The sunk cost fallacy keeps you tied to money already lost. Recency bias can turn the latest move into a new anchor. The trading psychology overview covers all of these.

Frequent questions

Is anchoring bias the same as using support and resistance?

No. Support and resistance in technical analysis are price areas that many traders watch. Anchoring is a personal error where a price you remember distorts your judgement. A level becomes a problem when you treat it as something the market must respect.

Can I remove anchoring completely?

Research suggests it is very hard to remove. Even people warned about anchors are still affected. Written rules and checklists reduce its influence. They do not eliminate it.

Why does my entry price feel so important?

It is the price you paid, so it is tied to your sense of gain and loss. The market does not use it. Judging a trade from current conditions is a skill you build through trading discipline.

Will these exercises improve my results?

They can help you make more consistent decisions. They do not guarantee profit, and leveraged trading can still lose money fast.