Support and resistance

Support and resistance are the most useful ideas in charting — not because lines predict the future, but because they tell you where your trade is wrong. Here is how to find them and use them properly.

What support and resistance actually are

Support is a price area where a falling market has repeatedly stopped falling. Resistance is where a rising market has repeatedly stalled. Nothing magical lives at these prices: they simply mark levels where enough buyers or sellers turned up last time to turn the market around — and because traders remember them, orders tend to gather there again. Think of a supermarket promotion: when something useful is marked down far enough, shoppers clear the shelves. When a share or an index returns to a price where buyers appeared before, some of them tend to reappear. The mechanism is collective memory and clustered orders, not the line you have drawn.

Zones, not lines

Open a daily chart and mark the places where price has clearly turned more than once. The levels worth keeping share three features:

• several distinct touches, not one lucky bounce;
• sharp reactions rather than hesitations;
• enough recency that today's traders still care.

Draw each one as a zone a handful of points deep rather than a razor-thin line. With the FTSE 100 trading around 10,650, nobody is defending 10,642 precisely — but the area between roughly 10,600 and 10,650 might matter a great deal. Round numbers earn a place on the chart too: levels such as 10,500 or 11,000 attract orders simply because humans think in round numbers. They behave like any other support or resistance, with one catch — everyone else can see them just as clearly as you can.

The real use: stops and trade structure

For a spread bettor, a level's practical value is that it tells you where your idea is wrong. If you buy the FTSE because it has held support three times, a clean fall through that support removes the reason for the trade — so the stop belongs just beyond the zone, and the stake should be sized so that hitting it costs an amount you can accept calmly. Our guides to stop-losses and risk management cover the mechanics.

Levels also let you judge a trade before you place it. If support sits 40 points below your entry and the nearest resistance 25 points above, you are risking more than the trade can plausibly pay. Walking away at that point is technical analysis doing its real job.

Breakouts, false breaks and stop clusters

Because obvious levels are visible to everyone, the space just beyond them fills up with stop orders. Markets routinely poke through a well-watched level, trigger that cluster, and then reverse — the false break. You cannot avoid this entirely, but you can stop making it easy: place your stop beyond the zone rather than one point past the obvious line. Genuine breaks — often driven by a scheduled release from the economic calendar — tend to move fast and keep going, which is exactly when an ordinary stop can suffer slippage.

When levels break — and what they never tell you

Broken support has a habit of turning into resistance, and vice versa: traders who bought at the old level and watched it fail are often relieved sellers when price returns to it. This role reversal is one of the more dependable behaviours on a chart — which still does not make it dependable in any absolute sense. No level holds reliably, none carries information about tomorrow's news, and a market gapping on results or a central bank surprise will treat your carefully drawn zone with complete indifference.

Treat every level as a probability rather than a promise. Mark your zones on an index you follow — our indices section is a good place to start — then spend a month on a demo account recording how often price respects them, breaks them or fakes through them, before moving on to the rest of the technical analysis toolkit.

The test of a real trade: you can point at the level that proves it wrong. If you cannot, you do not have a trade — you have a hope.