Real-time crypto screener

Directly from WebSocket streams of four exchanges: Binance, MEXC, OKX, and Bybit. The server receives every trade as it happens, aggregates data every 250 ms, and instantly delivers updates to your browser via WebSocket.

Latency from exchange to screen is a fraction of a second. This is not a delayed feed or a once-per-minute API poll — every trade reaches the screener almost instantly.

A signal triggered when trading volume for a selected period sharply exceeds the historical average. The higher the multiplier, the stronger the anomaly.

Watchlist — coins you added to favorites: always visible regardless of filters. All Coins — all other active pairs that passed the minimum activity threshold. Volume Spike — coins whose trading volume currently sharply exceeds the historical average. Price Change — coins with the largest % price movement over the selected timeframe.

Current volume or activity is below the set thresholds, or there are temporary disruptions in the data stream from the exchanges.

Yes, on two levels. System thresholds sit right in the screener header: timeframe and % price change threshold, minimum daily pair volume, averaging period and multiplier for spikes, activity threshold for the all-coins block — everything applies without a page reload. On top of that you can assemble a custom filter from eleven metrics — see Custom filters.

A filter is a set of conditions over metrics: volume over a window, spike multiple, volume acceleration, price change, volatility, trade count, average trade size, buy and sell ratios. Each metric has its own timeframe. The same filter works as a table in the screener, as a source of notifications and as a webhook trigger — the condition is defined once.

Three ways: an in-app feed with push notifications to your device, messages from the Telegram bot @ranvol_bot, and a webhook to your https endpoint (Premium). Conditions are evaluated on the server, so a signal reaches you even with the tab closed. The free plan has a daily cap on the number of notifications; Premium has none.

It is an automatic POST request to your endpoint the moment a filter fires, with a request body you describe through your own template. That way the signal goes straight into a trading bot or an internal system, with no copy-paste. For Veles Finance the form is pre-filled with a ready preset, but the endpoint can be any https address — the service is not tied to a single integration. Webhooks are part of the Premium plan.

The screener and charts work without an account. Signing in is needed for everything tied to you personally: watchlist, custom filters, notifications, the density map (it stores your list of coins) and settings sync across devices.

Yes. On a phone use «Add to Home Screen» in the browser menu; on a desktop use the install icon in the address bar. The app opens without the address bar, remembers the last screen and shows a saved market snapshot while the connection is being restored.

The screener, charts and the order book heatmap are free. The paid Premium plan costs 799 ₽ for 30 days, raises the limits on custom filters and notifications and unlocks webhooks. A single payment covers the period — there are no recurring charges. See Pricing and Payment & refunds (in Russian).

Payments are processed by Robokassa — by bank card or via the Faster Payments System; card details are entered on the payment provider's secure page. Access is granted automatically once the payment is confirmed. You may cancel at any time: the unused days are refunded within 10 days, as described in Payment & refunds (in Russian).

No. RanVol is an informational tool that shows market activity as-is. All trading decisions are yours alone and at your own risk.