Support is a price level below the current price where the market has already reacted upward. Resistance is a level above it where the market has already reacted downward. Both are zones drawn from price history: they show where a reaction is more plausible than elsewhere, never what price will do when it gets there.
This page covers that one idea. It belongs to the cluster on structured market reading, whose hub is the method explained in detail.
What a price level is for
A chart holds thousands of prices. A level singles out a few that have a history: price reversed there, slowed there, or was rejected there. The level's job is to tell you where to look, and above all where not to look.
In practice it does three things: it picks the places worth preparing before the session, it lets you place a stop against something real on the chart instead of an arbitrary dollar amount, and it tells you when the context has changed (a level that gives way is information).
It does not predict. A support that held three times has no obligation to hold a fourth.
How to read it on a chart
A level is found through past reactions, not geometric neatness. The most readable candidates are old highs and lows still visible on screen, the extremes of a previous session, and areas where price spent time before moving on.
Two reading rules prevent most mistakes:
- A level is a zone, not a line. The market does not respect a price to the decimal. On Micro E-mini Nasdaq-100, CME Group sets the minimum tick at 0.25 index points, so a reaction can happen a few ticks before the level or a few ticks beyond it. Drawing a one-pixel line and expecting an exact touch asks the market for a precision it does not have.
- Timeframe matters. A level read on a higher timeframe aggregates more trading than one read on a short chart. It is usually more significant, without being more reliable.
The same price changes role depending on where price sits. When an old support is broken, it is then watched as possible resistance, and the reverse. That reading is common and useful for context. It describes what happened, not what will happen.
The classic mistake: treating a level as a promise
The mistake starts with the vocabulary. The words "support" and "resistance" suggest a floor and a ceiling, solid objects. A price level is only solid as long as the participants who acted there keep acting the same way. Nothing forces them to.
It usually takes three forms:
- entering a position "because it's support," without defining what would prove you wrong;
- drawing so many lines that every price becomes a level, which amounts to having none;
- keeping a level after it has failed, waiting for it to "take back."
The fix is one question asked before every level: what would price have to do for this level to stop mattering? If you have no answer, you don't have a level, you have a conviction.
What a level does not tell you
It does not tell you direction. A level can stop price just as easily as price can run through it without slowing.
It does not tell you timing. Price can sit near a level for a long time without touching it, or touch it ten times before breaking it.
It does not tell you how much to risk. Position size and maximum loss are set by risk-management criteria, and in a prop firm account by the firm's rules, however good the level looks. Those constraints are covered in the full definition of a prop firm.
Finally, it is not enough on its own. Zones are ranked by crossing several genuinely independent readings: that is the subject of the page on confluence. The glossary entry sums the term up in three lines, and the full execution framework is the Prop System.
Frequently asked questions
Does support have to be a round number?
No. A round number can be a level, because many orders sit there, but support is defined by observed reactions, not by the digits. A price with no history on the chart is not a level, even if it is round.
How many touches does it take to validate a level?
No number guarantees anything. The more often a level has been touched, the more visible it is, and the more likely it is to give way. A level's visibility tells you about attention, not about outcome.
What should you do when support breaks?
First, acknowledge that the reading was invalidated and drop the idea that rested on it. What comes next depends on your framework: the broken level may become a context marker, but it does not become a signal.
Ephore Market doctrine article, published September 30, 2026. The minimum tick of Micro E-mini Nasdaq-100 was checked on September 30, 2026 on the official CME Group contract specifications page. These specifications can change: always check the official source before trading.
Futures trading involves substantial risk of capital loss. This article is educational and does not constitute investment advice.