Parabolic RSI puts a Parabolic SAR on the RSI line rather than on price.
That's the whole idea, and it changes where the flips land.
Why the substitution matters
A Parabolic SAR on price is chasing the thing it's plotted on. In a range it flips on every swing, because every swing takes out the trailing dot.
Run the same accelerating trail on RSI and it stops watching price at all. It watches momentum. The dot climbs under a rising RSI and only flips when the RSI itself turns hard enough to catch it, which is not the same moment price turns and frequently is not the same bar.
The mechanism is the standard one: an extreme point, an acceleration factor that starts at Step and grows by Step on each new extreme up to Maximum, and a trailing value pulled toward the extreme by that factor. Defaults of 0.02 and 0.2 are the usual ones. What's swapped is the input series.
Two tiers of signal, and the difference is where the flip happened
A flip alone gets a small marker on the price chart. A flip that happens with RSI beyond the threshold gets a bigger, solid one.
High Threshold is 70 and Low Threshold is 30. So the large arrows are the flips that occurred from genuinely stretched momentum, and the small ones are flips that happened somewhere in the middle of the range.
On the gold chart above you can count them: a handful of large arrows against a couple of dozen small ones. That ratio is the tool telling you which flips had a stretched reading behind them, and it is the only piece of grading in here.
Normal signal size and Extreme signal size control the two glyph sizes if you want the contrast stronger.
What's on the chart
The subwindow holds the RSI and the SAR dots, on a fixed 0 to 100 scale with a line at 50 and lines at your two thresholds.
The signal markers go on the price chart, not in the subwindow, so you read the levels below and act on the marks above without switching your eye between panes.
Both the RSI and the SAR are plotted buffers, so iCustom gets you the oscillator and the trail. The signal glyphs are chart objects.
| Parabolic SAR on price | This | |
|---|---|---|
| What the trail follows | Price | The RSI line |
| In a range | Flips on every swing | Flips when momentum turns, which is less often |
| Signal grading | None | Two tiers, split at 70 and 30 |
| Where marks appear | On price | On price, with the oscillator below |
| Readable by an EA | Yes | Yes, both buffers |
Alerts
One notification path, wired to the signals. Notification type ships as none, so pick terminal, email, push or Telegram before expecting anything. The Telegram fields carry placeholders rather than blanks.
Where it's weak
MT5 only. There is no MT4 build of this one.
The SAR has no idea what price is doing. That's the point and it's also the risk. A momentum flip during a strong trend can mark a pullback that price never honours, and nothing in the tool cross-checks against structure, volatility or a trend filter.
The two tiers are the only filter. There's no minimum move, no confirmation bar, no cooldown. Every flip is marked, and in a choppy stretch where RSI oscillates around 50 the small markers come thick and fast.
Fixed 0 to 100 scale. Sensible for RSI and it means a violent instrument and a quiet one look identical in the subwindow. The dots' spacing is the only clue to how fast momentum is moving.
The acceleration factor is shared state. It resets on a flip and grows on each new extreme, exactly like the price version, which means a long one-way run tightens the trail until a small counter-move ends it. On RSI that happens sooner than most people expect, because RSI mean-reverts by construction.
No divergence detection. RSI is the natural home for it and there is none here. This is a trail and a grader, nothing else.
Thresholds are fixed numbers, not percentiles. 70 and 30 mean different things on different instruments. If your symbol rarely reaches 70, you will rarely see a large arrow, and lowering the threshold is the fix.
Questions you'll have
Does Parabolic RSI repaint? The current bar's RSI and trail move while the bar is forming, as any oscillator and any SAR do. Once a bar closes its dot is fixed, and the markers stay on the bar that produced them.
What's the difference between the small and large markers? Where the flip happened. Large means RSI was beyond 70 or below 30 at the flip; small means it flipped somewhere in between.
Why does it flip in places a normal SAR doesn't? Because it isn't following price. The trail is computed on the RSI series, so it turns when momentum turns.
Can I change the thresholds? Yes, High Threshold and Low Threshold. They set both the level lines and the boundary between the two marker tiers.
Why am I getting so many small markers? Because every flip is marked and RSI crosses its own trail often in a range. If you only want the graded ones, read the large glyphs and treat the small ones as context.
Can an EA read it? Yes. The RSI and the SAR trail are both plotted buffers, so iCustom gets the value and the trail level. The glyphs are chart objects.
Why aren't I getting alerts? Notification type ships as none. Set a channel, and replace the placeholder Telegram values if you use that route.
Is there an MT4 version? No, this one is MT5 only.
Best timeframe? H1 and above. On M5 the RSI turns often enough that the trail spends its life flipping.
Support
Send me a message with a screenshot, the symbol and the timeframe, and I'll tell you what the tool was doing on that bar.
Analysis tool. It places no trades and makes no profitability claim. Past price behaviour is not a guide to future price behaviour.