It shows the drop from the high and the volatility as weather (noise, correction, storm), so you don't sell in fear in the middle of a crash and miss the biggest rebound days.
Drag the handle to compare the chart with and without Storm Radar.
Calculated from historical data. Future returns are not guaranteed.SP:SPX · 1D · 2005.06–2010.06Chart: TradingView
ProblemWhen the chart starts to fall you can't tell a passing wobble from a real bear market
FixIt splits the daily close into noise (within −10%), correction (−10 to −20%) and storm (−20% or more, adjustable) in clear weather colours.
ProblemYou sell in a panic and then miss the big rebound right after
FixGold stars (★) on the chart and the panel's sentence show you that the best days cluster inside storms, giving you the strength to hold.
ProblemYou check charts and news all day, wondering when it will calm down
FixSet the four alerts (correction, storm, wind easing, back at the high) and keep the chart closed the rest of the time.
On daily closes it colours the drop from the high in three steps: noise (within −10%), correction (−10 to −20%) and storm (−20% or more). It also measures how many times usual (the 1-year median) the last 20 days' swings are, and marks ◎ on the first day the wind falls 25% below the storm's strongest.
It puts a gold star (★) on the 10 biggest one-day gains in the period on your screen and counts, live, how many of them came inside a storm.
The panel at the bottom right shows the weather icon (☀/🌧/⛈), a 10-cell depth bar (1 cell = 4%), how many days the state has lasted and the date and price of the high, in 8 languages. Four alerts (correction, storm, wind easing, back at the high) and an optional past-replay table in the settings.
In all 8 markets, from stock indices to Bitcoin and gold, simply holding earned more per year than selling at the −20% storm line and buying back only when the old high returned.
| Market | Keep holding (per year) | Sold at the storm line (per year) | 10 best days inside storms |
|---|---|---|---|
| S&P 500 · 1927– | 6.2%333× | 2.6%12.3× | 10 / 10 |
| S&P 500 TR · 1988– | 11.2%50.4× | 8.1%17.7× | 9 / 10 |
| Nasdaq 100 · 1985– | 14.3%187× | 9.0%29.2× | 9 / 10 |
| KOSPI · 1996– | 4.5%3.4× | −0.5%0.9× | 9 / 10 |
| Nikkei 225 · 1965– | 5.9%31.7× | 2.6%4.8× | 8 / 10 |
| DAX · 1987– | 8.4%19.8× | 2.9%2.9× | 9 / 10 |
| Bitcoin · 2014– | 67.7%204× | 13.3%3.6× | 6 / 10 |
| Gold · 2000– | 9.8%9.6× | 5.4%3.6× | 2 / 10 |
The biggest rebound days hide in the middle of the scariest crashes, so stepping out in fear means missing years of compounding.
S&P 500 (from 1927), sold at the storm line (−20%) and bought back after the old high returned — 2.6% a year.
Nasdaq 100 (from 1985), sold the same way — 9.0% a year.
KOSPI (from 1996), sold the same way — −0.5% a year.
Use the copy button and the guide you get right after payment, paste it into TradingView and it works.
Past performance does not guarantee future results.
Built independently by ChartArmory from the public drawdown and realised-volatility calculations.
A signal on a closed bar never changes; only today’s unfinished bar can move.
Other symbols and higher timeframes use only data available at that moment, so no future values leak into past signals.
Past examples are calculated after trading costs (0.1% per side), and you can download the raw data as JSON.
The exact names you see in TradingView’s settings (Inputs tab).8 languages supported
After the daily close, open the index chart and check the weather icon and the %-from-high bar in the panel at the bottom right.
If it is a violet storm below −20%, see how many gold stars sit inside the storm on the chart.
Look at how many times usual the wind is and whether ◎ appeared, then set the alerts and close the chart instead of selling in fear.
Hiring a developer usually costs $2,000–$5,000+ and weeks of building and testing. Here, one payment gets you tested Pine Script v6 source right away, yours to keep.
Use Storm Radar to hold through the storm, and if you want to add more, let Crash Ladder set the staged buy levels below the high.
View indicatorEach indicator is sold separately; combined results have not been tested.
No. It is not a trading signal that marks entries and exits; it is a holding aid that helps you resist selling in fear during a crash.
No. It is not a rule that earns more than holding (a rule that raised exposure in storms did not beat holding either). Prices can keep falling after the storm line (45.6% more in 2008), it suits indices and index ETFs better than single stocks that may never recover, assets where big crashes are rare (such as gold) have many stars outside storms, and the stars are recalculated when you move the screen.
No. It only shows the first day the last 20 days' swings fell 25% below that storm's strongest wind; it does not guarantee the storm is over.
Yes. The defaults are −10% (noise/correction) and −20% (storm) from the high, and you can change them in the settings to suit the asset. The hold vs sell-at-the-storm-line table can be switched on there too.
One payment gives you the full Pine Script v6 source (copy button and TXT right after payment), the 8-language panel and install guide, and 30 days of bug-fix support. Personal use and editing are allowed (no redistribution or resale).
You can edit it for personal use. Sharing, redistribution and resale rights are not included.
After the storm line, a harsh winter with another 45.6% fall followed, but when the old high returned, the one smiling was the one who stayed.
On 9 July 2008 the S&P 500 price index closed at 1,244.69, crossing the −20% storm line for the first time, and then fell another 45.6% to the 9 March 2009 low. Someone who sold in fear that day and came back only when the old high returned on 28 March 2013 still had the same cash (0%), while the one who sat it out was up 26.1% (the 2020 storm +36.6%, 2022 +29.1%, 2001 +29.7%).
S&P 500 price index daily closes (no dividends; the same index as TradingView SP:SPX) · the seller is assumed to wait in cash (no interest) until the old high returns
Download the calculation record (JSON) ↓Keep Storm Radar on your chart and finish the course calmly, watching data and weather instead of the fear in the news.
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