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Big Brother

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Overview

See whale and market-maker buy levels on GMGN, Axiom, FOMO, Pump.fun Terminal, and Dexscreener — avg buy/sell MC lines to trade from

Trade smarter. Become a Big Brother. Big Brother Extension — Avg Buy / Avg Sell MC lines on the terminals you already use 📈 CHART LINES Avg Buy MC and Avg Sell MC for a rank range you choose (1–100). Holders and traders use different colors so the two books stay readable. Lines update with the token page. Toggle each line on or off. 👥 HOLDERS Weighted average by tokens held right now. Default: only wallets where GMGN already computed avg cost / avg sold. Optional phishing-wallet path uses transfer in/out from the same payload. Burn, LP, and your local blacklist are always excluded. The % on the label is supply covered by wallets that actually entered the average. 📊 TRADERS Top traders by profit. Equal-weight average (inventory is treated as zero). If GMGN is missing avg cost or avg sold, both sides are rebuilt from buy + tx in / sell + tx out. Trader lines can draw as soon as that set is in. 👁️ THE EYE A floating control on the chart: toggles, GMGN API Key, Test key, refresh. Gear → Docs (formula + optional Ed25519 public PEM for GMGN). Gear → Blacklist (local wallet list, used in the average). Gear → Account (pay, redeem, Recovery). 🔑 HOW TO USE 1. Open a token page. The Eye appears on the chart. 2. Paste a GMGN API Key from gmgn.ai/ai into the Eye or the popup and press Test key. The key stays on your device. 3. Gear → Account to pay or redeem a code. Save Recovery before you uninstall a paid install. 🔒 WHAT IT DOES NOT DO • It does not follow wallets, place trades, or give financial advice. • It does not generate a GMGN API Key. Docs can generate a public PEM that GMGN asks for; the API Key still comes from gmgn.ai. • It does not read your seed phrase or clipboard. Uninstall deletes the account secret on that device. • Chrome Web Store and unpacked installs have different IDs and do not share the same account.

Details

  • Version
    1.12.12
  • Updated
    August 30, 2026
  • Features
    Offers in-app purchases
  • Offered by
    Big Brother
  • Size
    2.14MiB
  • Languages
    English (United States)
  • Developer
    Email
    bigbrodotbusiness@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization

Big Brother has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

Big Brother handles the following:

Authentication information
Website content

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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