Support & Resistance
The price levels where buyers and sellers keep showing up, why they form, and how traders use them to plan entries and exits.
Floors and ceilings
Support is a price level where a falling stock has repeatedly stopped and bounced, because buyers showed up there. Resistance is a level where a rising stock has repeatedly stalled and pulled back, because sellers showed up. Think of support as a floor and resistance as a ceiling.
These levels are not magic lines. They are zones where a lot of trading decisions cluster, which is why price tends to react when it gets there.
Why these levels form
Markets have memory. If a stock bounced hard off $40 last month, buyers who missed it may be waiting to buy there again. Traders who bought near $50 and watched it fall may be eager to sell once price gets back to $50 so they can break even. Round numbers, prior highs and lows, and big gap levels all attract orders, and orders create reactions.
How to draw them
- Start on a daily chart and look for obvious turning points: places where price reversed more than once.
- Draw a horizontal line or zone through those turning points. Zones are more realistic than exact pennies.
- More touches generally mean a more important level; recent touches matter more than old ones.
- Levels where volume was heavy tend to be stronger.
- Keep it simple — a few clear levels beat a chart covered in lines.
When levels break: role reversal
When price finally pushes through resistance and holds above it, that old ceiling often becomes a new floor. The same happens in reverse: broken support often becomes resistance. Traders call this role reversal, or a "polarity flip." A stock that breaks out and then pulls back to test the old resistance from above, and holds, is showing strength.
A real chart: the gold line marks a resistance level price tested before breaking through it with force.
Using levels to plan trades
Support and resistance turn a vague idea into a concrete plan. If you buy near support, the logical stop goes just below it: if the floor breaks, the reason for the trade is gone. The next resistance level above is a natural first target. The distance between the two tells you whether the trade offers a good reward-to-risk ratio before you ever click Buy.
| Plan element | Where it usually goes |
|---|---|
| Entry (bounce trade) | Near support, after price shows it is holding |
| Entry (breakout trade) | Just above resistance, as price clears it |
| Stop | Just beyond the level that proves you wrong |
| First target | The next major level in your direction |
Turning levels into a trade plan.
Common mistakes
Beginners often draw too many lines, treat levels as exact to the penny, or place stops exactly at obvious levels where many other stops sit. Give levels a little breathing room, focus on the most obvious zones, and always remember that a level can break. Support and resistance tell you where to pay attention, not what will definitely happen.
Round numbers and gaps
Some levels matter simply because people notice them. Round numbers like $50 or $100 attract orders because investors tend to set targets and stops there. Gaps, where price jumps between one day’s close and the next day’s open, often leave behind levels that act as support or resistance later, since traders who missed the move watch for price to return. The high and low of a big earnings-day candle are also closely watched for the same reason.
When several of these line up — a prior high, a round number and a gap edge all near the same price — that zone tends to be especially important.
Levels on different time frames
Levels exist on every time frame. A weekly chart shows the big floors and ceilings that long-term investors watch. A daily chart shows the levels swing traders use. Intraday charts show levels that may matter for only a few hours. When a level lines up on more than one time frame, such as a daily support that is also a weekly low, it tends to draw more attention. A practical rule: find the major levels on the higher time frame first, then zoom in to plan your entry.
Key takeaways
- Support = floor where buyers step in; resistance = ceiling where sellers step in.
- Levels form because traders remember past prices and cluster orders there.
- Draw zones through repeated turning points; more touches and volume mean stronger levels.
- Broken resistance often becomes support (and vice versa).
- Use levels to set entries, stops and targets before you trade.