Don't take trading claims
on trust. Test them.
A visual, no-code strategy builder and backtester for US stocks and ETFs
Learn technical analysis, put indicators on historical charts, build trading rules without code, and see what the data actually shows. Charts, 60+ indicators, visual strategy building, backtesting and event analysis in one place.
- 50+lessons
- 60+indicators
- 22practice scenarios
- 14K+US stocks & ETFs with your own key
400+ built in
Learn → Explore → Build → Test → Investigate
Understand indicators, patterns and market concepts.
Put them on historical charts and see how they behave.
Turn an idea into visual rules without writing code.
Backtest those rules and inspect what happened.
Define a market condition and examine what tends to happen around it.
What you actually get.
Click any image to see it full size.
What you can do
Explore indicators
See indicators on historical charts, change their parameters and examine how they behave. Over 60 are available on weekly, daily, hourly and five-minute charts, each documented with what it measures and where it falls short — including intraday session tools such as the Opening Range and Anchored VWAP. Premium adds automatic candlestick-pattern detection, marked on the chart.
Technical indicators explained →Build without code
Create precise buy and sell rules using a visual logic tree — plus delays, timing windows that hold a condition open across bars, exits on gain, a stop loss or time held, and exits at the end of the session or the week. Seven classic strategies come ready-built, and you can build signals of your own.
Test strategies
Run rules against historical data on weekly, daily, hourly or five-minute bars and inspect return, drawdown, exposure and individual trades. Set your own starting capital, fees and period. One stock, five stocks, or five strategies side by side.
How to backtest without code →Investigate events
Define a market condition and examine what tends to happen around it across historical events. Reports price movement, speed, volatility and volume either side of the condition, with the number of events behind every figure.
How event analysis works →Practise decisions
Replay historical market situations bar by bar with nothing at stake. The ticker and the dates are hidden, and you buy and sell as it unfolds. 22 scenarios covering trend, momentum, volume and risk.
Screen a universe
Filter a 200-stock universe on 62 computed technical metrics, or run one of your saved strategies across all of them and see which names it fires on.
Data available to you
Historical end-of-day market data. Real-time trading is currently not supported.
US stocks, ETFs and indices
Build backtests and event analyses across 400+ US-listed stocks, ETFs and indices using historical market data, on daily (1d) and hourly (1h) bars — and weekly (1w) and five-minute (5m) bars on Premium.
On Premium, connect your own free Tiingo key to take the same tools to 14,000+ US stocks and ETFs, with candlestick charts.
More markets over time
Additional markets and asset classes may follow as coverage and data licensing reach the same standard as the US data above.
Nothing here is a commitment to a particular market or date.
The useful skill is knowing what your rules actually do.
A simple pricing structure
Free: learn and test on SPY. Premium: the same workflow across 400+ US stocks, ETFs and indices — or 14,000+ US stocks and ETFs with your own free Tiingo key.
No time limit. No card required.
The whole workflow on the S&P 500 ETF.
- 50+ lessons across five courses
- All 60+ indicators documented in the reference library
- Pattern gallery, market regimes, scam protection
- Track your progress and resume where you left off
- Charts, backtesting and Event Analysis on the S&P 500 ETF (SPY) — a single fund holding the 500 largest US companies as one combined price
- Every indicator and every preset, fully configurable
- Run strategies one at a time and compare the results
- Save 3 custom indicators and 3 alerts, strategies or events
- Event Analysis — define a condition on SPY and measure what happened around it
- 1d and 1h timeframes — daily and hourly bars
- Paper simulation — all 22 scenarios, daily and hourly
- Screener preview on the Magnificent 7
The same workflow across 400+ instruments — 14K+ with your own key.
Or $139.99 a year — $11.67 a month, saving $27.89. Cancel any time.
- Everything in Free, unchanged
- Charts, backtesting and event analysis on 400+ US stocks, ETFs and indices
- Extend to 14,000+ US stocks and ETFs with your own free Tiingo key — candlestick charts, weekly (1w) and 5-minute (5m) bars, every indicator on hourly bars, and up to 20 years of daily history
- Screener — the full 200-stock universe, 62 metrics
- Multi-ticker and multi-strategy backtests — up to five of either at once (Free runs one ticker, one strategy)
- Pool up to ten instruments into one event sample (Free studies SPY alone)
- Combine up to 50 Tiingo instruments into one event study with your own Tiingo key (100 on a Tiingo Power key)
- Save up to 30 instrument lists and load them into a study
- 20 custom indicators and 30 alerts, strategies and events saved
- Compare multiple tickers side by side
- US market data included
Listed in US Dollars. Your billing country decides the currency you are actually
charged in — UK customers are billed in pounds — and Paddle shows the exact
total in that currency before you confirm. VAT is included where applicable, and
sales tax may be added at checkout depending on your country or state.
Switch or cancel any time — cancelling returns you to Free rather than locking you out.
14-day money-back guarantee on your first payment, no reason needed.
Full refund policy in our Terms.
We collect the bare
minimum.
We ask for what's needed to run your account and the tools in it.
- No advertising trackers. We never sell your data
- Saved strategies and practice history are private to you
- Card details go to Paddle and never reach us
FAQ
What can I use GU Analyser for?
Learn the tools, put indicators on historical charts, build rules without code, backtest them, and see what happened around market events. It all runs on historical market data.
Do I need to know how to code?
No. The Strategy Builder is a visual logic tree: pick conditions and wire them together with AND, OR and NOT. The same canvas handles timing windows, delays, stop losses, and gain- or time-based exits when you want them.
What is Event Analysis?
You define a market condition — RSI below 30, say — and the app finds every stretch of history where it held, then measures what happened around those events. It reports price movement, speed, volatility and volume either side of the condition, with the number of events behind each figure.
Does GU Analyser tell me what to buy?
No. GU Analyser provides analytical and educational tools rather than investment recommendations, signals or alerts.
Will a backtested strategy make money?
A backtest shows how a set of rules behaved on historical data. It cannot predict future performance.
Is there a free plan?
Yes, with no card and no time limit. All 50+ lessons and the reference library are free, and the tools run on the S&P 500 ETF (SPY), with a screener preview on the Magnificent 7. Premium at $13.99/month or $139.99/year runs the same tools across 400+ US stocks, ETFs and indices, and can extend them to 14,000+ US stocks and ETFs with your own free Tiingo key. UK customers are billed the equivalent in pounds.
Which markets and data are available?
Over 400 US stocks, ETFs and major indices on historical data, in four timeframes: weekly (1w), daily (1d), hourly (1h) and five-minute (5m). The free plan includes 1d and 1h; 1w and 5m are Premium features that run on your own free Tiingo key — see below. Real-time trading is not supported.
What do the charts show?
A closing-price line with the indicators you choose, layered over the price or in panels beneath it, plus a relative volume panel. With your own Tiingo key connected (Premium), charts show full candlesticks and the volume Tiingo reports. Every parameter is adjustable.
Does the app find candlestick patterns for me?
On Premium, yes. It detects a curated set of classic patterns — hammers, engulfings, morning and evening stars among them — marks each on the chart, and makes it available as a condition in your rules. Detection works on any chart, and the reference library draws every pattern it looks for.
Are the indicators available on weekly, hourly and five-minute bars?
Yes. Indicators run on daily (1d) and hourly (1h) bars, and on weekly (1w) and five-minute (5m) bars on Premium with your own Tiingo key. Weekly bars are built from the daily bars, one candle per trading week.
What does connecting my own Tiingo key do?
It is an optional Premium feature. Add a key from Tiingo, an independent market-data provider, and charts, backtests, event studies and the paper simulation can run on 14,000+ US stocks and ETFs, with candlesticks, up to 20 years of daily history and five-minute (5m) bars. It works on Tiingo's free plan, which allows 50 requests an hour. We charge nothing extra and earn nothing from Tiingo, and your key and the data it fetches are never stored on our servers. A lesson in the Technical Analysis course walks through it step by step.
How is this different from a charting platform?
GU Analyser combines learning, historical chart analysis, visual strategy building, backtesting and event analysis. It is designed for investigating an idea from several angles in one place.
Not answered here? Write to hello@guanalyser.com — we read everything.
I built this because I needed it.
Hi, I'm Alessio.
I'm an aerospace engineer. At work you don't get to claim something works — you model it, test it, and let the data decide.
When I started looking at technical analysis I found lots of confident claims and almost no way to check them.
So I built a place to check them. No signals. No invented track record. Just the tools to look.