The rules
- Benchmark: BTC for crypto and crypto perps, SPY for US stocks and ETFs, ES for CME futures. It has to be in the scan, so the columns fill in once it has loaded.
- vs bench 1M / 3M / 6M: how much the price ÷ benchmark ratio changed over 1, 3 and 6 months (21, 63 and 126 trading days; 30, 90 and 180 days for crypto). Above 0 means it beat the benchmark.
- RS line new high: the price ÷ benchmark ratio at its highest in the last year. When it leads the price to a new high, many traders read it as strong demand.
- Mansfield RS: the ratio against its own 200-day average, in %. Above 0 means outperforming the benchmark’s longer trend.
- RS: the weighted 3, 6 and 12-month return ranked against everything scanned (0–99), the same as on the gainers screener.
Calculated in your browser from daily candles. Not investment advice.
Frequently asked questions
Why compare with a benchmark?
A stock up 5% while the market is up 10% is lagging. Relative strength strips out the market move, so you see which names institutions are favouring. For crypto, most coins move with BTC, so beating BTC is the bar.
Which markets can it scan?
Four, picked with the Market buttons above the table. Crypto (the default) scans the 250 busiest USDT pairs on Binance. Crypto perps scans the 200 busiest USDT perpetual futures on OKX. Both are free public data and need no key. US stocks scans about 600 US stocks and ETFs with your own free Alpaca key, and CME futures scans about 25 front-month CME Group contracts (stock indexes, Treasuries, oil, gas, metals, grains, livestock, currencies and CME bitcoin) with your own free Massive key.
Why do stocks and futures need a key?
Stock and futures prices are licensed data, so a website can’t hand them out for free. Alpaca (for stocks) and Massive (for futures) give anyone a free data key. Your key is saved only in your browser and sent only to that provider. See how to get a free Alpaca key and how to get a free Massive key for futures.
Is the data real-time?
Crypto and crypto perps are live from Binance and OKX, on daily candles that start at 00:00 UTC (today’s candle is still forming). Alpaca’s free stock data is 15 minutes behind the market, and Massive’s free futures plan is 8 hours delayed. Turn on auto-refresh next to the results to update the table in place every 30 seconds, minute or 5 minutes.