Support, Resistance & Trend Lines

Support and resistance describe the price levels where the balance between buyers and sellers repeatedly shifts. They are the most fundamental concept in technical analysis because they map where the market has reacted before — and where it is likely to react again.

Defining the levels

Support is a level where falling prices have tended to attract enough buying to halt the decline. Resistance is a level where rising prices have tended to attract enough selling to cap the advance. Both form because market participants remember these prices: traders who bought at support defend it, and those who sold at resistance reinforce it.

Think in zones, not lines

Beginners draw a single pixel-perfect line and expect price to turn there exactly. In reality, support and resistance are zones. Price may overshoot slightly, wick through, and reverse. Treat levels as areas of interest where you watch for confirmation, rather than precise triggers.

The role reversal principle

One of the most reliable behaviours in markets is role reversal: once resistance is decisively broken, it often becomes support on a retest, and broken support often becomes resistance. This happens because the psychology of the level flips — former sellers become buyers defending their new entries.

The market has a memory. Levels matter because thousands of traders are watching the same prices and acting on them at the same time.

Drawing trend lines that matter

A trend line connects the structure of a move: rising lows in an uptrend, falling highs in a downtrend. A valid line touches at least two points and is confirmed by a third. The more touches a line has without breaking, the more significant it becomes — and the more meaningful its eventual break.

Combine horizontal levels with trend lines to find confluence — areas where multiple signals overlap. Those zones are where the highest-probability reactions tend to occur.