What is the hottest program in the savvy Reddit day trader crowd for finding good trades based on liquidity, volume, OI, volatility, float, etc
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The Reddit day-trading community has coalesced around a clear hierarchy of tools, with different tiers dominating depending on whether the focus is pure equity scanning vs. options/dark pool flow analysis.
The Undisputed #1: Trade Ideas (for Equity Scanning)
Trade Ideas is consistently the most-cited scanner in r/Daytrading and r/RealDayTrading for the core criteria you mentioned — RVOL, float, volatility, liquidity, and price range. Its HOLLY AI engine scans 8,000+ US stocks simultaneously and fires alerts in real time based on 500+ configurable filters. What makes it stand out is the Signal Scanner (event-based: “stock just made a new high”) vs. the Data Scanner (state-based: “stocks currently matching these filters”) — running both together is the Reddit-endorsed workflow. The OddsMaker backtesting engine runs on tick data with no coding required, which is a big draw.
Pricing: $127/mo (Basic) or $254/mo (~$178/mo annually for Premium with HOLLY AI). It gets mixed UX reviews — powerful but steep learning curve.
For Options Flow + OI + Dark Pool: Unusual Whales vs. Tradytics
These two dominate the Reddit r/options and r/Daytrading options-flow threads:
| Platform | Best For | Price | Key Edge |
|---|---|---|---|
| Unusual Whales | Beginners, options flow + dark pool combo | Free – $55/mo | Congressional trade tracking, largest free tier (2M+ users) |
| Tradytics | AI-assisted flow scoring, dark pool + sentiment | ~$40–65/mo | ML models score dark pool activity; net options flow for 0DTE SPY |
| Cheddar Flow | Budget options + dark pool combo | ~$35/mo | Best value paid tier; frequently cited as Unusual Whales alternative |
| FlowAlgo | Mobile-first dark pool + options alerts | ~$75–125/mo | Best mobile app; real-time dark pool print feed |
| BlackBoxStocks | Community + live voice discord alerts | ~$100/mo | Live moderated alert room; community-driven plays |
Reddit’s consensus on options flow: Unusual Whales for the free entry point, Tradytics as the “upgrade” for AI scoring, and Cheddar Flow as the budget all-in-one.
Free/Freemium Tier: Finviz + Thinkorswim
For traders not ready to pay, Finviz (rated 4.2/5 across Reddit reviews) handles end-of-day float, volume, short float, and fundamental screening well — but its free tier is 15-minute delayed. Thinkorswim (TOS) is the most-recommended free real-time scanner, especially for custom ThinkScript scans combining ATR%, RVOL, and price range filters. The TOS community-shared scan (ATR(30) / Close) * 100 > 5 for intraday volatility is a Reddit staple.
Emerging Challengers in 2026
Scanz has gained strong traction as a dedicated day-trading-first scanner with sub-second latency, 65+ real-time filters, and pre-market activation at 4am ET. It activates its gap scanner, volume spikes, and low-float movers before the opening bell and lets you run pre-market and intraday scans simultaneously. TrendSpider wins on automated technical analysis (AI-drawn trendlines, Fibonacci, pattern recognition) but is more of a charting layer than a raw screener.
The Reddit-Endorsed Filter Stack
Regardless of platform, the community-agreed core scan parameters for day trading are:
- RVOL > 1.5x–2x (relative volume, time-adjusted)
- Float < 20M shares (low float = explosive intraday moves)
- ATR% > 3–5% (minimum volatility threshold)
- Price $3–$20 (avoids sub-penny behavior and over-cap sluggishness)
- % Change > +10% pre-market (in-play momentum)
- News catalyst (high RVOL + no news is a different beast)
For options-specific scanning, the community adds volume/OI ratio > 0.5 and sweep orders on unusual call/put OI as the key signals.