A crypto screener saves you from opening hundreds of charts. You set conditions, such as "RSI below 30 on the 4-hour chart" or "MACD just crossed up on the daily", and it lists the coins that match right now. What makes one good is less the number of indicators than how clearly it shows coverage, timeframe and timing.

What to look for in a free screener

  1. Coverage you can see. Does it scan the top 100 coins, the top 1,000, or every listed coin? A screener that silently skips small caps can give a false picture.
  2. Timeframes. RSI on the 15-minute chart and RSI on the daily chart tell different stories. You want to pick the timeframe per filter.
  3. Timing of the signal. "MACD crossed up" is more useful with "3 bars ago" next to it. Old crosses are already priced in.
  4. Combined filters. One indicator alone produces many weak hits. Pairing RSI with a trend filter (for example price above the 200 EMA) or with a volume spike cuts the list down.
  5. One click to the chart. A screener is a shortlist, not a decision. You should be able to open each coin's chart and check it yourself.

How to set up a simple RSI and MACD scan

  1. Choose one timeframe that matches how long you plan to hold, such as 4 hours.
  2. Add an RSI (14) filter: below 30 to look for oversold coins, or crossing above 50 to look for momentum turning up.
  3. Add a MACD filter: histogram turning positive, or a cross within the last few bars.
  4. Add a trend or liquidity filter so you are not looking at thinly traded coins.
  5. Open each result's chart and read it in context before doing anything.

Common mistakes

  • Treating oversold as a buy signal. RSI can stay below 30 for a long time in a downtrend.
  • Mixing timeframes. A daily uptrend and a 15-minute sell-off can both be true at once.
  • Ignoring the data source. Indicator values differ slightly between exchanges and between aggregated and single-exchange prices.
  • Skipping practice. Paper trading or backtesting a scan first shows how often it is wrong.

Alternatives, fairly

TradingView has a widely used crypto screener with many technical columns; how much of it you can use depends on your plan, so check its current plan page. Services such as altFINS add pre-built chart patterns and signals, with some features on paid plans. Exchange apps often include simple top-gainer and volume lists, which are a quick first look but rarely filter by indicators. The best choice depends on whether you need wide coverage, many filters, or alerts when a condition is met. For a walk-through of the indicators themselves, see how to read RSI and MACD on a crypto chart.

Hunt4Coin

Disclosure: Hunt4Coin is built and run by Quantumines, the studio that publishes this answer.

Hunt4Coin offers free crypto prices, candle charts and a screener. Its scanner is free and the coverage limit is stated plainly.

ItemHunt4Coin scanner
Coins coveredThe top 100 coins by market cap
Timeframes15 minutes, 1 hour, 4 hours and 1 day
FiltersRSI (14), Stochastic RSI, MACD histogram and bars since its last cross, distance from the EMA 200, EMA 50/200 crosses, Bollinger %B and band width, Supertrend direction and bars since it flipped, ADX, volume against its 20-bar average, ATR as % of price, distance from recent high and low
Ready-made scansOversold RSI, fresh MACD cross, Supertrend flip, volume spike, Bollinger squeeze and others
Wider searchA separate Signals page checks about 2,100 coins for one specific uptrend setup
Cost and accountFree, no paid plans; saving scans needs a free account
LimitsInformation only, not financial advice; never places trades or asks for exchange API keys

Facts from hunt4coin.com, checked on 8 November 2026.

This answer explains a tool and a method; it is not investment advice.