In short
StackViewer connects to Trading 212 through SnapTrade using read-only OAuth. It imports your Invest and Stocks ISA positions — including fractional shares — along with your full transaction history, cash balances and dividends, then merges them with your other brokers into one portfolio. Holdings inside a Pie come across as their underlying individual positions, so you get true per-stock performance rather than one blended Pie figure. Connecting Trading 212 is free.
What syncs from Trading 212
Positions
Every open holding in your Invest and Stocks ISA accounts, including fractional shares down to the tiny slivers Pies and AutoInvest produce. Each holding carries its quantity, average cost and current value.
Trade history
Your buys and sells with dates, prices and quantities — the raw material StackViewer needs to reconstruct entry and exit quality and hold periods. Automated Pie purchases arrive as ordinary trades on the underlying instruments.
Cash & balances
Free funds and uninvested cash per account, so your cash drag and true invested percentage are counted rather than guessed at.
Dividends
Dividend receipts land as income events and feed a combined dividend calendar across all your brokers — including the small, frequent dividends fractional US holdings generate.
What does not come across: Trading 212 CFD accounts (a separate, leveraged product StackViewer is not built for), the Pie/AutoInvest schedule itself (StackViewer sees the resulting trades, not your future rebalancing rules or target weights), pending orders, and any interest accrued on uninvested cash before it is paid. Custom or off-platform assets are excluded across StackViewer generally.
Sync runs three times a day and position values refresh about every 30 minutes during market hours. StackViewer is not a real-time tool and is not built for day trading.
What Trading 212's own reporting doesn't show you
Trading 212's headline portfolio return is a money-weighted rate of return (MWRR) — it folds every deposit and withdrawal into the figure. That is honest, but it answers "how much has my money grown given when I added it," not "how good were my picks." If you paid in a lump sum just before a rally, MWRR flatters you; if you drip-fed via AutoInvest into a falling market, it drags your number down even when your selections were sound. StackViewer computes a time-weighted return alongside it, which strips out the timing of your deposits so you can see the performance of the holdings themselves. The two numbers together tell you far more than either alone. (Return methodology per Trading 212's Portfolio Charts help article, as of 2026-09-10.)
The bigger blind spot is Pies. A Pie is a single tile in Trading 212 — a container that can hold up to 50 stocks and ETFs, each with a target percentage, rebalanced automatically as you deposit under either a "Self-Balancing" or "By Targets" rule. That is brilliant for building a habit and dreadful for post-trade analysis, because the app largely reports the Pie as one blob. StackViewer unwinds it: every slice becomes an individual position with its own cost basis, hold period, contribution to return and risk contribution. So you can finally see that your "S&P 500 core" Pie is up while the three speculative slices you tucked inside it have quietly cost you money — something the Pie-level view masks. Because AutoInvest buys fractional shares, StackViewer's per-position figures are computed on fractional quantities, and its Sharpe, Sortino, Alpha, Beta, Max Drawdown and VaR metrics run on those unbundled positions rather than on the Pie wrapper. (Pie limits and distribution rules per Trading 212 help centre, as of 2026-09-10.)
Also use Vanguard?
Trading 212 and Vanguard is one of the most common UK pairings we see: Trading 212 for the low-cost, fractional, day-to-day investing and Pies, and Vanguard for a core index or a separate Stocks & Shares ISA held for the long haul. The problem is that your true picture is split across two apps with two different return methods and two ISA allowances to keep straight. Connect both and StackViewer produces a single time-weighted return across the two accounts, a combined diversification score, and one dividend calendar — rather than two apps you mentally add together.
How the combined multi-broker view works →
Is it safe to connect Trading 212?
The connection is read-only OAuth through SnapTrade. You log in on Trading 212's own site — StackViewer never sees your credentials and never stores them. The token that comes back can read positions and history and nothing else: StackViewer cannot place a trade or move a pound, and no trading permission is requested at any point. You can revoke access from inside Trading 212 whenever you want.
Data is encrypted with AES-256 at rest and TLS 1.2+ in transit, authentication runs on AWS Cognito with optional TOTP MFA, and you can export everything to CSV or delete your account at any time. Full detail on the security page.
Which other brokers can you connect?
StackViewer supports 31 brokers. Search for the others you use:
Frequently asked
- Is it safe to connect Trading 212 to StackViewer?
- Yes — read-only OAuth through SnapTrade. StackViewer never sees your Trading 212 credentials and cannot trade or move money. Revoke it from Trading 212 in one click.
- Can StackViewer place trades on my Trading 212 account?
- No. The token is read-only and trading permission is never requested.
- How often does Trading 212 data sync?
- Three times a day, with position values refreshed roughly every 30 minutes during market hours.
- Is the Trading 212 integration free?
- Yes, on the free plan, with no credit card.
- What Trading 212 data does StackViewer import?
- StackViewer imports your Invest and Stocks ISA positions (including fractional shares), your full buy/sell history, cash balances and dividends. Holdings inside a Pie are imported as their underlying individual positions. CFD accounts and the Pie/AutoInvest schedule itself are not imported.
See it working before you connect anything
The live demo is a real portfolio with six months of history and every analysis screen populated. No signup, no email, no broker connection.
See the live demo or connect Trading 212 freeNo credit card · Read-only access · Free forever plan
StackViewer is not affiliated with, endorsed by, or sponsored by Trading 212. Trading 212 and its logo are trademarks of their owner. Broker connectivity is provided through SnapTrade and the available data depends on what Trading 212 exposes; details verified 27 April 2026 and subject to change. Not financial advice.