Trend Lines
Diagonal lines connecting swing highs or lows to define trend direction.
A trend line is a straight line drawn on a chart connecting two or more significant price points — either swing lows (uptrend line) or swing highs (downtrend line). It extends into the future and acts as a diagonal support or resistance level. An uptrend line connects progressively higher lows and slopes upward. A downtrend line connects progressively lower highs and slopes downward. The more times price touches and respects the line, the more significant it becomes.
Why It Matters
Trend lines are one of the simplest and most effective tools for options traders. They define the trend's trajectory and give you a reference point for when the trend might be changing. As long as price stays above an uptrend line, the bias is bullish — buy calls, sell puts, run bullish spreads. When price breaks below the uptrend line, the trend may be over and it is time to reassess.
Trend lines also help with strike selection and risk management. If a stock has been bouncing off a rising trend line at predictable intervals, you can sell a put spread with the short strike placed below that trend line. The trend line gives your trade structure — you know exactly where you are wrong if price breaks through.
How It Works
Drawing trend lines correctly:
- Uptrend line: Connect at least two significant swing lows. The line should touch the lowest point of each pullback. A third touch confirms the line's validity.
- Downtrend line: Connect at least two significant swing highs. Each rally peak should touch or come close to the line.
- Use closing prices or wicks? Opinions vary. Some traders draw lines to the candle bodies (closes), others to the wicks (intraday extremes). Be consistent with whichever method you choose.
Key rules:
- Two touches create a line. Three touches confirm it. A trend line touched three or more times is considered significant and widely watched.
- Steepness matters. Very steep trend lines (45 degrees or more) are unsustainable and will eventually break. Moderate slopes (20-35 degrees) tend to persist longer.
- Breaking the trend line is a signal, not a guarantee. A break below an uptrend line suggests the trend may be changing, but false breakdowns happen. Look for confirming signals like volume expansion or a retest of the broken line from below (now acting as resistance).
Channels: Draw a parallel line on the other side of the trend to create a channel. Price often oscillates between the trend line (support) and the channel line (resistance). This channel can guide iron condor strike placement or help you sell premium at the channel edges.
Limitations: Trend lines are subjective — two traders can draw different lines on the same chart. They work best on higher timeframes (daily and weekly) where the noise is filtered out. On 1-minute or 5-minute charts, trend lines break constantly.
Quick Example
A stock has bounced off a rising trend line three times over two months, with each bounce at a higher price — $50, $54, and $58. The trend line now projects support at $62 next week. You sell a put spread with the short put at $60 (below the trend line) and the long put at $57. The stock dips to $62.50, bounces off the trend line once more, and rallies to $67. Your spread expires worthless for a full profit, with the trend line acting as a reliable guide.