Chart Patterns

Trendline Break and Retest

A trendline connects a series of swing points, price closes through it, then comes back to test the same line from the other side, old support turning into new resistance or the reverse.

Click two points, draw your own line

Click any two candles on the chart to draw your own trendline through them, no pre-fit line to just accept. The tool then checks every other visible candle mechanically: does your line actually graze their wicks and respect their bodies, or does it cut straight through several of them? That becomes your touch-quality score. Once the line is drawn, play forward to the real break, watch the line's role flip, then call whether the retest holds or fails before the next bars print.

Click a candle's wick to set your first point.

Draw a line to see its touch-quality score.

Touch quality
Touches
Cuts through body
0
Retest calls made
Call accuracy

How it works

  1. Two points make a line, but only real touches make it meaningful. Any two candles can be connected. What separates a real trendline from a lucky pair of clicks is whether the line, extended across every other candle in view, keeps grazing wicks and respecting bodies instead of slicing through them.
  2. A cut is different from a miss. If your line runs cleanly through a candle's real body, that candle is telling you the level did not hold there, a genuine strike against the line. A candle the line never comes near at all is neutral, it neither helps nor hurts the score.
  3. The break is a closing event, not a wick poke. This tool only counts a break once a candle's close, not just its high or low, ends up clearly on the other side of your line. A single long wick through the line and back is noise, not a break.
  4. The retest is the same line doing the opposite job. Whatever side the line used to hold price on, it now has to hold price on the other side for the level to be considered confirmed. That is the polarity flip, and it is the whole reason a break-and-retest entry is usually considered lower risk than buying or selling the break itself.

Where this breaks

A high touch-quality score still does not guarantee the retest holds

Touch quality measures how well your line describes what already happened, not what happens next. A trendline with a near-perfect score, four or five real touches and no cuts, can still fail its retest, because the participants who were defending that level on the way up are not obligated to keep defending it after the line has already broken once. Run this tool across enough setups and a real share of high-quality lines still fail, especially in the fastest, sharpest breaks, where the retest either never comes back far enough to test the line at all or blows through it in a single bar with no meaningful pause. Line quality is evidence about the past, not a promise about the retest.

Risk & liability disclaimer: This page is an educational tool only, not financial, investment, or tax advice, and not a recommendation to take any specific trade. The candles and price data shown are randomly generated simulations for illustration, not real market data. Every strategy shown carries a real risk of loss, including loss of principal.