← All lessons Track 05 · Technical analysis · Lesson 5.3

Support, resistance and trend

6 min read

Most technical analysis comes back to two questions: which way is the market trending, and where are the levels that matter?

Support and resistance

Support is a price where buying has repeatedly stopped declines. Resistance is where selling has repeatedly capped rallies. They form for real reasons:

  • Memory and regret: buyers who missed a stock at 100 may buy if it returns there. Holders who bought at 120 and watched it fall may sell when it gets back to break-even.
  • Orders: institutions often leave large orders around round numbers and prior highs and lows.
  • Options and positioning: large open interest at a strike can pin price nearby (lesson 3.4).

When resistance breaks, it often becomes support, and vice versa. Levels are zones, not exact lines.

Trend

An uptrend is a series of higher highs and higher lows. A downtrend is lower highs and lower lows. A range is neither. The simplest rule of trend following is not to fight it: buy pullbacks in an uptrend, sell rallies in a downtrend.

Moving averages

A moving average smooths price over a period. The 50-day and 200-day are the most widely watched in stocks. Price above a rising 200-day average is the most common definition of a long-term uptrend. A 50-day crossing above the 200-day (a golden cross) or below it (a death cross) gets headlines, but these signals lag and frequently whipsaw in sideways markets.

Timeframes

A stock can be in a daily downtrend inside a weekly uptrend. Decide which timeframe matches your holding period, and use higher timeframes for context. Most mistakes come from trading a 5-minute chart against a clear weekly trend.

Key takeaway

Levels show where others have acted before. Trends show who is in control. Both are most useful as a framework for risk (where you are wrong) rather than predictions.

Educational content only, not financial advice. Investing involves risk and you can lose money.

Sources (2)
  1. Osler, NY Fed Staff Report 125: Currency Orders and Exchange-Rate Dynamics
  2. Osler, NY Fed Staff Report 150: Stop-Loss Orders and Price Cascades in Currency Markets
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