Dynamic Support Line

Dynamic Support Line is a free MT5 indicator that draws a rising dynamic support line on your main chart. It suits you if you trade pullbacks in a rising market and want the support drawn, measured in ATR and alerted for you. It's a level and alert tool, and you add the decision on top. It builds that line from two confirmed swing lows or from an EMA-minus-ATR band, and it marks Touch Bounce and Support Break arrows on closed bars. In the Lab's repaint test on EURUSD M15, 0 of 487 arrows changed after they appeared.

What it draws on your chart

Two ways to build the line, set by SupportMode:

• Dynamic Support Line (SwingTrendline mode): a rising trendline through two confirmed swing lows, projected to the right of the current bar. When a close breaks it, the line is deleted. If ShowBrokenLines is on, it stays on the chart as a grey dashed line instead.
• MA Support Band (MovingAverageBand mode): a line set at an EMA minus a share of ATR. It only shows while the EMA is rising. While price holds above it, support is holding. A close below it marks the support as broken.
• Touch Bounce and Support Break arrows, covered in the next tab.
• Support Status panel: the last touch or break signal, line status and mode, current support price, distance to it in pips and in ATR, slope in points per 10 bars, touch count and anchor age.

How the Lab tested it

The Lab tested version 1.00 (108.3 KB) on MT5 build 6230 on 2026-10-05. The test ran on EURUSD M15 from 2026-07-06 to 2026-10-02, using real ticks from Raw Trading Ltd.

Every arrow was logged when it printed, then checked again at the end of the run. 0 of 487 arrows changed or disappeared, and the maximum arrow delay was 0 bars. Each arrow showed up on the bar that triggered it, not a few bars later. What you see in history is what you would have seen live.

What the signal numbers mean for you

For each arrow, the Lab checked whether price moved 1 ATR in the arrow's direction (up for a bounce, down for a break) before it moved 1 ATR against it. Across all arrows, 44.8% went the arrow's way first. That's slightly worse than a coin flip, so taken alone as 1:1 trades the arrows lose more often than they win, and spread or commission makes that worse.

Price resolved quickly. The median was 2 bars to hit one side, which is about 30 minutes on M15. Only 1.6% of arrows reached neither side within 20 bars, so your stop gets tested quickly either way. The test also logged 38.3 arrows a week on a single pair, which is several a day. You need a filter to choose which ones to take.

The two arrow types score almost the same, as the chart below shows.

Install: copy the file into MQL5/Indicators (File > Open Data Folder), refresh the Navigator and drag Dynamic Support Line onto a chart.

The drawing below shows how the line, the anchors and both arrows sit on the chart.

Reading the Touch Bounce arrow

The up arrow prints when all three of these are true:

• a support line is active;
• a closed bar's low reaches the line, or comes within TouchATRMult x ATR above it;
• that bar still closes above the line.

It tells you support was tested and held on a finished bar. In the test it fired 265 times, or 20.8 a week, and 1.5% of those reached neither 1 ATR target within 20 bars.

Decision rule: take a Touch Bounce only if the last swing high is at least 1 ATR above your entry, the same distance the Lab measured with. Skip it if price would hit that high sooner. This filter was not tested by the Lab. If you take it, put your stop more than BreakATRMult x ATR below the line. That's the point where the indicator itself would call the line broken.

Reading the Support Break arrow

The down arrow prints when a closed bar finishes below the active line by more than BreakATRMult x ATR in SwingTrendline mode, or below the band in MovingAverageBand mode. In the test it fired 222 times, or 17.5 a week, and 1.8% reached neither target within 20 bars.

Decision rule: first treat it as an exit for any long trade that relied on this line. Take it as a short only if the break bar also closes below the most recent swing low. Without that, you only know the uptrend has paused. You don't yet have a downtrend.

Three common misreads

• The line to the right of the current bar is a projection, not a forecast. ProjectBarsForward only extends it so you can see where support would sit if the slope holds.
• A wick through the line is not a break. In SwingTrendline mode, only a close more than BreakATRMult x ATR below the line counts. A wick that dips through and closes above is a touch, and a bar that closes below the line by less than BreakATRMult x ATR prints neither arrow.
• The approach alert is not a signal. It only warns you that price is getting close. No arrow prints until a bar closes.

The inputs to change first

Alerts and where they appear

Three events can alert you, and each has its own switch:

• Approach (AlertOnApproach): the low comes within ApproachATRMult x ATR above the line. The default is 1, with a range of 0.2-3.0.
• Touch (AlertOnTouch): a Touch Bounce arrow prints.
• Break (AlertOnBreak): a Support Break arrow prints.

EnableAlerts switches all of them on or off at once. Alerts arrive as a popup in the terminal (AlertPopup, on), a sound (AlertSound, on) or a push notification to your phone (AlertPush, off by default).

Use ShowDashboard and PanelScale (DPI is applied automatically) for the panel. Theme sets the chart color theme, and with RestoreTheme on, your original chart colors come back when you remove the indicator.