Trend lines and channels: drawing rules, breaks and mistakes

A trend line is a straight line that connects a series of swing lows in an uptrend or swing highs in a downtrend. It turns a vague feeling — "it seems to be going up" — into something you can check: as long as price respects the line, the slope of the trend is intact.

The basic drawing rules

A good trend line follows a few simple rules:

1. Connect at least two clear swing points. In an uptrend, use swing lows (the bottoms of pullbacks); in a downtrend, use swing highs.
2. A third touch confirms it. Two points define any line. The line becomes meaningful when price comes back and reacts to it a third time.
3. Don't cut through candle bodies. A line can pass through a few wicks, but if it slices through the bodies of many candles, it is not describing the market.
4. Don't force it. If you have to move the anchor points around to make the line fit, there is no trend line there.
5. Watch the angle. Very steep lines (a near-vertical surge) break quickly. Lines at a moderate slope tend to last longer.

Whether you anchor on wicks or bodies is a matter of preference. Pick one and stay consistent — mixing them on the same chart makes the lines meaningless.

A worked example

On USD/JPY, M5, price makes a swing low at 149.20, rallies, pulls back to a higher swing low at 149.35 forty minutes later, then rallies again. You connect 149.20 and 149.35 and extend the line to the right. The line rises about 15 pips every 40 minutes.

An hour later, price pulls back again. The line now sits around 149.55, and the pullback stops at 149.57 with a long lower wick, then pushes up. That third touch is the confirmation: the line has started to describe how buyers behave.

Later, a strong red candle closes at 149.42 while the line is at 149.70 — well below it. The trend line is broken. That does not automatically mean a downtrend has started; it means the orderly sequence of higher lows at that slope is over.

Channels

A channel adds a second, parallel line on the other side of price:

• In an uptrend, draw the trend line under the swing lows, then copy it and move the copy so it touches the swing highs.
• In a downtrend, draw the line over the swing highs and place the parallel under the swing lows.
• A horizontal channel is simply a range between support and resistance.

Channels give you a sense of rhythm. If price usually travels about 25 pips from the lower line to the upper line, a pullback to the lower line in an uptrend is "normal", and a failure to even reach the upper line is an early sign of weakness.

What a break really tells you

Trend lines break in a few different ways, and they mean different things:

• A decisive close beyond the line, followed by price staying there, suggests the trend has at least paused.
• A brief poke and quick return (a wick through the line, close back inside) is often just noise. Some traders redraw the line to the new low; others keep the original. Neither is wrong, but changing the line after every touch defeats its purpose.
• A break followed by a retest from the other side — price falls through an uptrend line, rallies back up to touch it from below, and turns down — is the classic sign that the line has switched roles, similar to support becoming resistance.
• A break with no follow-through, where price simply moves sideways, often means the trend is changing from a slope into a range rather than reversing.

Remember that a trend can continue at a gentler angle after breaking a steep line. A break is information about the slope, not a verdict on direction. For a cleaner definition of when a trend has actually reversed, see market structure.

Trend lines on short expiries

On very low timeframes like S5 or S15, swing points are tiny and plentiful, so you can draw a "trend line" through almost anything. Those lines rarely survive more than a few minutes. For expiries of 30 seconds to 5 minutes, it is more useful to draw the line on M1 or M5 and use it as a filter: favour Higher trades while price respects a rising line, and stay cautious near the line itself, where a touch can turn into a break within seconds.

Distance matters too. If price is 2 pips above a rising line and your expiry is 3 minutes, the line will move up during your trade; the trade can be decided by whether price meets the line or slips beneath it.

Common mistakes

• Drawing a line through only two points and treating it as confirmed.
• Redrawing the line every time it breaks so that it never breaks.
• Drawing lines on random-looking noise in low timeframes.
• Forgetting that OTC instruments on Sky Trade are generated by the server and do not track any real market; lines there summarise past movement, and the next move remains unpredictable.
• Treating a touch of the line as a sure bounce. It is a place to watch, not a signal on its own.

How to add it in the Sky Trade terminal

Pick the trend line tool from the drawing tools, click the first swing point, then the second; use the ray tool if you want the line to extend automatically into the future. For a channel, draw a second trend line parallel to the first across the opposite swings.