Follow Buffett's 13F filings, insider buying and Congress trades as paper portfolios, with 10 years of backtests after costs and tax. See which strategies actually beat the S&P 500, and which don't.
Most tips sound great until you check them. SignalTested checks them for you, with real data and real maths.
Copy a famous fund, follow insiders buying their own stock, or mirror Congress. Each comes with a 10-year track record.
Every strategy runs live with simulated money, so you see real results build day by day, with no risk.
Get alerts when a portfolio changes and a clear verdict on whether it's beating the market. Then decide, with your own broker.
Other apps show you the winners. We show you everything, including the strategies that lose to a plain index fund. Ten years, after trading costs and a 28% tax on gains.
| Strategy | Return / yr | After tax / yr | vs S&P 500 | Worst drop | Verdict |
|---|---|---|---|---|---|
| S&P 500 (benchmark) Buy and hold. Every strategy is measured against it. | +14.9% | +12.3% | — | -33% | benchmark |
| Copy Pershing Square Top 10 holdings from Bill Ackman's fund, re-copied each quarter. | +12.8% | +10.0% | -2.3% | -46% | Not proven |
| Copy Berkshire Top 10 holdings from each new Berkshire Hathaway 13F, bought the day after it's filed. | +11.6% | +9.0% | -3.3% | -40% | Not proven |
| S&P 500 + trend filter The index, stepping aside when it falls below its 200-day average. | +10.9% | +8.1% | -4.2% | -24% | Not proven |
Hypothetical backtests since 2016, rebalanced the day after each filing became public. Companies that were later delisted are included. "Not proven" means the difference vs the S&P 500 could be luck. Updated weekly.
Built on public SEC and House filings, checked every day.
8 strategies trading paper money daily, with holdings, weights and every buy and sell.
What Berkshire, Pershing and 10 other concentrated funds hold, and which stocks they agree on.
We drop routine, scheduled purchases and keep the unusual ones, using a method from Harvard research.
Every House stock disclosure, parsed within hours of filing, and tested against the market.
AI reads headlines and SEC 8-Ks on every holding and flags only what's material.
Know when a portfolio changes. See returns after costs and tax, not just the flattering number.
Plenty of sites show you what Buffett or Congress bought. Few tell you whether following it would actually have paid off.
| SignalTested | Free trackers Dataroma, OpenInsider, Capitol Trades | Data platforms WhaleWisdom, Quiver Quantitative | Copy-trading apps Autopilot, Composer | |
|---|---|---|---|---|
| 13F funds, insiders and Congress in one place | ✓ | One each | Mostly | Varies |
| 10-year backtests after costs and tax | ✓ | — | Some, before tax | Some, before tax |
| Live paper portfolios, no money at risk | ✓ | — | — | — |
| Plain verdict vs the S&P 500, including "not proven" | ✓ | — | — | — |
| AI flags material news on holdings | ✓ | — | Varies | Varies |
| Trades your real money | Never | No | No | Yes, that's the product |
| Price | Free to view Pro $19/mo | Free | Paid tiers e.g. WhaleWisdom from $90/quarter | Subscription e.g. Composer $24–30/mo |
"—" means it isn't a core feature, based on each product's public website as of October 2026. Features change; check each product yourself. Product names are trademarks of their owners; SignalTested isn't affiliated with any of them.
Less than one bad trade. Cancel anytime in two clicks.
No. SignalTested is research and education software. We show what strategies did and are doing, with paper money. What you do with your own money is your decision; consider speaking to a licensed adviser.
No. We never hold, move or trade your money and never ask for your brokerage credentials. If you decide to act on something, you do it yourself at your own broker.
Maybe, maybe not, and anyone promising otherwise is selling something. That's exactly why we show the full record, including strategies that trail the S&P 500 and verdicts like "Not proven". Our goal is to stop you paying to find out the hard way.
Public filings: SEC 13F-HR reports from investment managers, SEC Form 4 insider filings, and House Periodic Transaction Reports, plus market prices. 13F filings arrive up to 45 days after quarter end and Congress trades up to 45 days after the trade; we show those delays rather than hiding them.
You get the free plan immediately, no card needed. It's view-only: the scorecard and each portfolio's performance. Holdings, signals and alerts come with Pro, which you can start whenever you like; you can cancel in two clicks from your account and keep Pro until the end of the period you paid for.
They show you data. We turn the data into tested, running portfolios with an honest verdict on whether each one is worth following, after costs and tax.
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