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Sign UpFantrax Fantasy Baseball Trade Analyzer
Import your Fantrax league and score any trade in projected standings points under the league’s exact scoring. Rosters, settings, and standings come straight from Fantrax.
Free for the 2026 season. Works with Yahoo, ESPN, CBS, Fantrax, Ottoneu, NFBC, OnRoto, RTSports, and Fleaflicker.
On another platform? Rosters, settings, and standings pull in automatically:
How the Fantrax import works
Fantrax gives every account a Secret ID for external applications, on your Fantrax profile page. Paste it into RotoHound and every baseball league on the account is listed; pick one and the rosters, scoring, roster slots, and standings import. The RotoHound Chrome extension can do the same from your signed-in Fantrax tab, and it also carries the transaction log, which Fantrax shows only to a signed-in session.
Trade impact in standings points
Pick the two teams and the players on each side. RotoHound applies the trade to both rosters, rebuilds each lineup, and recalculates the projected league standings. The result is the number of standings points each side gains or loses, so a trade offer becomes a concrete number instead of a gut call.
Category-by-category breakdown
Every scoring category shows its before and after. You can see which categories the trade helps, which it costs, and how the rest of the league moves around you. Points leagues get the same treatment in projected points.
What RotoHound reads from a Fantrax league
Fantrax leagues import with their actual lineups in place, and in a weekly league RotoHound reads the upcoming lineup period, so a trade made mid-week shows up on the rosters instead of waiting for the period to turn over. Scoring imports as configured: rotisserie or head-to-head, categories or points. The Fantrax default roster (C, 1B, 2B, 3B, SS, CI, MI, five OF, Util, nine P, eight bench) is the starting preset.
How it works
1. Import your Fantrax league
Paste your Fantrax Secret ID, or import from your signed-in Fantrax tab with the Chrome extension. Rosters, settings, and standings pull in automatically.
2. Stage the trade
Pick the other team and the players moving each way.
3. Read the impact
Projected standings points gained or lost for both sides, with a category-by-category breakdown.
Frequently asked questions
Where is the Fantrax Secret ID?
On your Fantrax profile page, in the field labeled Secret ID (external applications). It is a read-only key: RotoHound can list and read your leagues with it, and nothing more.
Why does RotoHound show next week’s roster in my weekly league?
Because that is where Fantrax applies any move made after the current period starts, including trades. RotoHound reads the upcoming period so the roster it scores is the one your next lineup will actually use.
How does RotoHound score a trade?
It applies the trade to both rosters, rebuilds each team’s lineup, projects every team’s rest-of-season stats, and recalculates the league standings. The score is the change in projected standings points for each side, using your league’s exact categories or point values.
Does it work for points leagues and head-to-head?
Yes. RotoHound models rotisserie and head-to-head leagues, category and points scoring, and custom formats, including platform presets for Yahoo, ESPN, CBS, and FanGraphs points.
Where do the projections come from?
RotoHound publishes its own rest-of-season projections, updated daily. You can also upload projections from FanGraphs or any other source, and every tool uses whichever system you set as your default. The methodology page explains how the built-in projections are made and how they benchmark against Steamer and ZiPS. Read the methodology
Is RotoHound free?
Yes. RotoHound is free for the 2026 season with a free account.
Import your league
Free for the 2026 season. The Trade Analyzer opens with your league loaded as soon as the import finishes.
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