Welcome to Vertex Street
Vertex Street is an AI-powered backtesting platform that answers your investment questions using real historical market data. Describe what you want to test in plain English and see the results.
These docs walk you through everything Vertex Street can test.
Your First Backtest
Let's run one together. Copy this prompt and paste it into Vertex Street — the result below is exactly what it returns, and it's live: switch views, zoom, hover the chart.
Buy SPY when RSI(14) drops below 30, sell all when RSI crosses above 70| Date ▲ | Signal | Price | Return % | Hold Days | Units | Total P&L | Portfolio | Conditions |
|---|---|---|---|---|---|---|---|---|
| 2023-08-17 | BUY | $436.29 | — | — | +2 (SPY) | — | $10,000.00 | RSI(14) below 30 |
| 2023-08-18 | BUY | $436.50 | — | — | +2 (SPY) | — | $10,000.42 | RSI(14) below 30 |
| 2023-08-21 | BUY | $439.34 | — | — | +2 (SPY) | — | $10,011.78 | RSI(14) below 30 |
| 2023-09-14 | SELL | $450.36 | 2.97% | 28 | -6 (SPY) | $77.90 | $10,077.90 | RSI(14) crosses above 70 |
| 2023-09-20 | BUY | $438.64 | — | — | +2 (SPY) | — | $10,077.90 | RSI(14) below 30 |
| 2023-09-21 | BUY | $431.39 | — | — | +2 (SPY) | — | $10,063.40 | RSI(14) below 30 |
| 2023-09-22 | BUY | $430.42 | — | — | +2 (SPY) | — | $10,059.52 | RSI(14) below 30 |
| 2023-09-25 | BUY | $432.23 | — | — | +2 (SPY) | — | $10,070.38 | RSI(14) below 30 |
| 2023-09-26 | BUY | $425.88 | — | — | +2 (SPY) | — | $10,019.58 | RSI(14) below 30 |
| 2023-09-27 | BUY | $426.05 | — | — | +2 (SPY) | — | $10,021.28 | RSI(14) below 30 |
What you'll see
Every backtest comes back in three parts:
- Summary card — Total trades, win rate, total return, max drawdown, and how it compares to just holding SPY
- Candlestick chart — SPY's price with green/red markers showing where each buy and sell happened
- Trade table — Every trade listed with date, price, return %, and hold duration
Try changing it
Now tighten the thresholds — buy deeper dips (RSI 25) and exit earlier (RSI 65) — and run again. Here's that result:
Buy SPY when RSI(14) drops below 25, sell all when RSI crosses above 65Tighter thresholds = fewer trades but potentially higher quality entries. Compare the two summaries — did the win rate improve? Did you miss big moves? This tweak-and-rerun loop is how you refine a strategy in Vertex Street.
Other simple examples
a. Run a full buy/sell backtest strategy
Buy SPY when RSI drops below 30, sell when it crosses above 70. Start with $10,000 over the last 5 years.b. Ask how often an event occurs
How often has Apple fallen more than 5% in a single week over the last 10 years?c. Get data-driven answers about the market
What was Tesla's revenue growth rate each year for the last 5 years?