VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View Portfolio123 View Unusual Whales Back to Home

Head-to-head

Portfolio123 vs Unusual Whales comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

Portfolio123 adds Quant, Backtesting, Correlation, Broker Connectors, and Data Visualizations coverage that Unusual Whales skips.

Unusual Whales includes Options & Derivatives, Paper Trading, Dark Pool & Off-Exchange, Alerts, News, US Government Trades, Insider Data, 13F, Education, and Dividends categories that Portfolio123 omits.

Portfolio123 highlights: Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry., Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data., and Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging..

Unusual Whales is known for: Live options flow across all US options exchanges, with a status indicator so you know the feed is healthy., Dark-pool tape plus ‘Dark Pool Levels’ to surface recent prints and ticker-specific liquidity zones., and Options and stock screeners with filters for premium, volume, open interest, IV rank, and common technicals..

Unusual Whales offers mobile access, which Portfolio123 skips.

Portfolio123

portfolio123.com

Editor’s pick Hands-on review

Quant research and live-deployment platform with point-in-time fundamentals and estimates. Users can screen, backtest, and simulate strategies, then deploy them live with broker integrations. Supports API access and a no-code desktop DataMiner. FactSet or S&P Compustat licenses are required for full historical fundamentals.

Platforms

Web

Desktop

API

Pricing

Free

Subscription

Quick highlights

Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry.
Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data.
Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging.
‘Books’ feature to combine multiple strategies and view correlations between them.
Point-in-time fundamentals, estimates, and corporate actions with dividends handled on ex/pay dates (no survivorship bias or look-ahead).

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Unusual Whales

unusualwhales.com

Editor’s pick Hands-on review

Real-time options flow and dark-pool analytics built for active traders. Free plans view delayed data; paid tiers stream live flow, with annual plans unlocking data downloads. The public API is sold separately, and “Periscope” (market-wide SPX exposure) is available as an add-on.

Platforms

Web

Mobile

API

Pricing

Free

Subscription

Quick highlights

Live options flow across all US options exchanges, with a status indicator so you know the feed is healthy.
Dark-pool tape plus ‘Dark Pool Levels’ to surface recent prints and ticker-specific liquidity zones.
Options and stock screeners with filters for premium, volume, open interest, IV rank, and common technicals.
Options Profit Calculator to model multi-leg strategies, Greeks, and payoff P/L.
Paper trading for both stocks and options to test ideas without risk.

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Overlap

Shared focus areas

5 overlaps

Mutual strengths include Screeners, Portfolio, and Calendar plus 2 more areas.

Where they differ

Portfolio123

Distinct strengths include:

Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry.
Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data.
Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging.
‘Books’ feature to combine multiple strategies and view correlations between them.

Unusual Whales

Distinct strengths include:

Options & Derivatives

Paper Trading

Dark Pool & Off-Exchange

Live options flow across all US options exchanges, with a status indicator so you know the feed is healthy.
Dark-pool tape plus ‘Dark Pool Levels’ to surface recent prints and ticker-specific liquidity zones.
Options and stock screeners with filters for premium, volume, open interest, IV rank, and common technicals.
Options Profit Calculator to model multi-leg strategies, Greeks, and payoff P/L.

Feature-by-feature breakdown

Attribute	Portfolio123	Unusual Whales
Categories Which research workflows each platform targets	Shared: Screeners, Portfolio, Calendar, APIs & SDKs, Data APIs Unique: Quant, Backtesting, Correlation, Broker Connectors, Data Visualizations	Shared: Screeners, Portfolio, Calendar, APIs & SDKs, Data APIs Unique: Options & Derivatives, Paper Trading, Dark Pool & Off-Exchange, Alerts, News, US Government Trades, Insider Data, 13F, Education, Dividends
Asset types Supported asset classes and universes	Stocks, ETFs	Stocks, ETFs, Options
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate, Advanced
Platforms Where you can access the product	Web, Desktop, API	Web, Mobile, API
Pricing High-level pricing models	Free, Subscription	Free, Subscription
Key features Core capabilities called out by each vendor	Unique Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry. Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data. Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging. ‘Books’ feature to combine multiple strategies and view correlations between them. Point-in-time fundamentals, estimates, and corporate actions with dividends handled on ex/pay dates (no survivorship bias or look-ahead). Coverage of 15,000+ equities in the U.S., Canada, and Europe, including delisted stocks and spinoffs.	Unique Live options flow across all US options exchanges, with a status indicator so you know the feed is healthy. Dark-pool tape plus ‘Dark Pool Levels’ to surface recent prints and ticker-specific liquidity zones. Options and stock screeners with filters for premium, volume, open interest, IV rank, and common technicals. Options Profit Calculator to model multi-leg strategies, Greeks, and payoff P/L. Paper trading for both stocks and options to test ideas without risk. Portfolio Manager with broker linking for IBKR, tastytrade, Fidelity, and Robinhood.
Tested Verified by hands-on testing inside Find My Moat	Yes	Yes
Editor pick Featured inside curated shortlists	Highlighted	Highlighted

Frequently Asked Questions

Which workflows do Portfolio123 and Unusual Whales both support?

Both platforms cover Screeners, Portfolio, Calendar, APIs & SDKs, and Data APIs workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do Portfolio123 and Unusual Whales require subscriptions?

Both Portfolio123 and Unusual Whales keep freemium access with optional paid upgrades, so you can trial each platform before committing.

Which tool has mobile access?

Unusual Whales ships a dedicated mobile experience, while Portfolio123 focuses on web or desktop access.

What unique strengths set the two platforms apart?

Portfolio123 differentiates itself with Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry., Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data., and Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging., whereas Unusual Whales stands out for Live options flow across all US options exchanges, with a status indicator so you know the feed is healthy., Dark-pool tape plus ‘Dark Pool Levels’ to surface recent prints and ticker-specific liquidity zones., and Options and stock screeners with filters for premium, volume, open interest, IV rank, and common technicals..

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