ChartXpert AIChartXpert AI

Chart drawing tools: trendline, ray, price line and measure

Updated 2026-09-246min readUsing the platform

ChartXpert AI ships four drawing tools: a trendline between two points, a ray that extends into the future, a horizontal price line with an axis tag, and a measure tool showing the price difference, percent and candle count between two points. Drawings anchor to time and price rather than to the screen, so they stay glued to their candles while you pan and zoom, and they are saved per symbol on the device — and follow you between phone and desktop once you sign in.

The four tools and when to reach for each

Trendline

How to draw it
Drag from one point to another
Used for
Joining two highs or two lows to read the slope

Ray

How to draw it
Drag from the start point along the move
Used for
Extending the line over the candles to come

Horizontal price line

How to draw it
Click the price you want
Used for
Pinning an important level with its price on the axis

Measure

How to draw it
Drag from the start of a move to its end
Used for
Reading the difference in points, percent and candles

Drawing on desktop

  1. 1Pick a tool from the vertical rail at the edge of the chart — the cursor changes and a hint shows the active tool.
  2. 2Press and drag to see the shape form live, then release to commit it.
  3. 3Click an existing shape to select it: its endpoints appear. Drag an endpoint to change the slope, or the middle to move the whole shape.
  4. 4Escape cancels an unfinished drawing or clears the selection; Delete removes the selected shape.
  5. 5To go back to normal navigation, choose the select cursor at the top of the rail and dragging pans history again.

Drawing on a phone

On small screens the tools live in the horizontally scrolling top toolbar. Tap a tool, then drag with one finger on the chart to draw. With no tool armed, one finger pans history and two fingers pinch to zoom as usual. Your drawings stay glued to their candles while you navigate and through every price update.

Reading the measure tool

measure readout

 +187.35   +7.67%   432 bars
 │         │        └─ candles between the two points
 │         └─ percentage move
 └─ absolute price difference (sign = direction)

A measurement is temporary by nature: it stays until you tap empty space or start a new drawing, because you usually need it for a moment of comparison rather than to keep. The numbers always read left to right in arithmetic order, even in the Arabic interface, as price reading convention requires.

Saving and sharing

  • ▸Drawings are saved per symbol on the device instantly, and need no account to start.
  • ▸Sign in and they are stored with your account too, so opening the symbol on the phone shows the lines you drew on the desktop.
  • ▸Changing timeframe does not clear them: each shape is anchored to time and price, so it lands in the right place on the new timeframe.
  • ▸The snapshot button turns the chart, your drawings and your studies into a single shareable PNG.
  • ▸Full screen widens the drawing area on desktop before you work on fine detail.
  • ▸The eraser button clears every drawing on the current symbol and leaves other symbols untouched; the clearing travels to your other devices too.
The save state sits next to the drawing tools: “Saved to your account” when signed in, “On this device” for a guest. Your account page lists every symbol you have drawings on and opens it in one tap.

From a drawing to an alert

A shape you drew can watch the market for you. Select a horizontal line, a trendline or a ray, then press the bell in the tool rail: a horizontal line gives an alert at a fixed number, while a sloped line gives one whose level travels with the slope at every check. From then on the alert runs on the server and reaches your phone and inbox, even if you clear the drawing or close the page.

drawn line ─> select ─> bell ─> alert
  horizontal ─> fixed level
  trendline  ─> level moves with the slope

frequently asked

Quick questions, direct answers

How many shapes can I draw on one symbol?+

You can keep many shapes on the same symbol, and their count shows next to the drawing tools. The eraser clears them all for the current symbol only.

Do drawings disappear when prices update?+

No. The live candle refreshes every few seconds while the drawings hold their place, even while you are dragging one.

How do I get back to navigation after drawing?+

Choose the select cursor at the top of the tool rail, or press Escape, and dragging pans history again.

Can I turn a trendline I drew into an alert?+

Yes. Select the line and press the bell; the line's two endpoints are stored with the alert, so the watched level moves with the slope at every check. A perfectly vertical line is refused, because it has no single level.

Apply this on live candles now

Open the chart workspace, pick one of the seven public venues, then switch on pattern and liquidity detection and watch the frame rate as you zoom.

Related guides

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