Trendline
Technical analysisA straight line connecting successive swing lows in an uptrend or swing highs in a downtrend.
In plain terms
Two points make a line; three touches make it evidence. Steep ones break constantly.
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Glossary
Every term is defined twice: once the way a filing would put it, and once the way somebody would explain it to you across a table. The second one is usually the one that sticks.
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Trendline break
Technical analysisPrice closing decisively through a drawn trendline.
In plain terms
Weaker evidence than a structure break. A trendline describes a rate of advance, so breaking it means the rate changed — not that the trend did.
Log scale trendline
Technical analysisA trendline drawn on a logarithmic price axis, where equal vertical distance represents equal percentage change rather than equal rupees.
In plain terms
On a linear chart a multi-year line curves away from price for purely arithmetic reasons. Anything over two years belongs on a log scale, or the line is measuring the axis rather than the trend.
Channel
Technical analysisA trendline with a parallel line drawn at the opposite extreme, containing price between two rails.
In plain terms
A framework, not a forecast. Failing to reach the upper rail warns you the trend is weakening before any line has broken.