Stock Watcher
Create account

See every position.
Understand every move.

A calm, global view of what you own, what it cost, and how it is performing—with optional user-confirmed Alpaca orders.

Create accountExplore the product
Portfolio tracking first. Orders require an authorized account and explicit confirmation.
New YorkLondonFrankfurtTokyoHong KongSydney
Example positionNVDA
$189.51+$5.51 · 2.99%
Interactive NVDA sample price chartInteractive time series with price, time, entry marker, and optional comparison.Entry $174.20
1:05 PM4:00 PM

Example fallbackLive feed reconnecting

Explore before you commit

See the portfolio story first.

Try a read-only synthetic portfolio with interactive charts before you create an account. Nothing here is saved, and no trade can be placed.

Explore before you commit

Sample portfolio

See the story a new investor would get from Stock Watcher. This is synthetic data and is read-only.

Demo mode
Current value$5,424.56
Invested capital$3,904.64
Open positions3
Synthetic sample portfolio chartInteractive time series with price, time, entry marker, and optional comparison.Entry $174.20
9:30 AM4:00 PM

NVNVDANVIDIA Corporation · 10 shares$2,089.6+19.95% return
AAAAPLApple Inc. · 8 shares$2,512.56+72.25% return
TSTSMTaiwan Semiconductor · 4 shares$822.4+16.82% return

Nothing in this panel is sent to Supabase, and it can never add, edit, or delete an account record.

From transaction to understanding.

Record the facts once. Stock Watcher organizes the rest into a portfolio you can actually read.

  1. 01

    Record transactions

    Capture the stock, shares, price, fees, currency, and date.

  2. 02

    Normalize the portfolio

    See native-market values translated into your chosen display currency.

  3. 03

    Understand performance

    Separate invested capital, current value, realized gains, and open-position return.

Portfolio intelligence,
without terminal noise.

Every number has a label, a method, and a timestamp.

  • Per-position invested amount and profit or loss
  • Performance versus SPY or QQQ
  • FIFO realized and unrealized return
  • Currency, exchange, and concentration views
Portfolio overviewExample data
Current value$24,860.42
Invested$20,410.18
Unrealized P&L+$4,450.24
Technology 46%Semiconductors 29%Other 25%
USDEURGBPJPYHKD

One portfolio.
Every native market.

Keep the original trade currency and see the full portfolio in the currency you use to make decisions. Conversion rates include their source and timestamp.

Private by design

Your account owns its portfolio rows. Authentication and database policies prevent one user from reading another user’s transactions.

Useful context

Quotes show whether a market is current, delayed, closed, or temporarily unavailable. Stale values remain visible with clear warnings.

Transparent methodology

Yahoo Finance supplies the demonstration market and currency feeds. Values are informational estimates, not execution prices or investment advice.

Know where you stand.

Build a clear record of what you own and why the numbers moved.

Create accountSign in