Follow our five-step route: sign up → verify → secure → buy USDT → get Bitcoin. Use referral code OK66688 and your trading fees are cut by 20% — for as long as you keep the account.
A referral can only be linked when the account is created. Sign up directly and you pay full price; sign up with OK66688 and every trade is discounted automatically — nothing to apply for.
Register with our link or code OK66688 and you save 20% on spot, perpetual and futures trading fees. The more you trade, the more you keep — calculate your savings →
SPOT · PERPETUALS · FUTURESOpen a sign-up box after registering and verifying, and a deposit box after your first deposit. Rewards include BTC, ETH or trading fee vouchers.
Complete new-user tasks in the rewards hub, and practise with demo trading before using real money.
| Compare | Direct sign-up | With code OK66688 |
|---|---|---|
| Spot feesMaker / Taker · Lv1 | 0.080% / 0.100% | 0.064% / 0.080% |
| USDT perpetualsMaker / Taker · Lv1 | 0.020% / 0.050% | 0.016% / 0.040% |
| Discount period | — | Permanent |
| Mystery box | Per campaign page | Up to 60,000 USDT |
| Add code later? | No | Linked at sign-up |
Estimated with OKX's regular-user (Lv1) base rates. Actual rates are shown on OKX's official fee page.
Claim the discount ↗From zero to your first Bitcoin in about 30 minutes. Each step has its own detailed guide if you get stuck.
Use email or phone and check that the code shows OK66688. About 3 minutes.
OKX sign-up guide →Upload an ID and do a face check. Results usually arrive within minutes.
KYC guide & common failures →Download only from official stores; turn on Google Authenticator and an anti-phishing code.
OKX app download →Use P2P with a verified merchant or buy with a card where available.
How to buy USDT →Swap in one tap with Convert, or buy a little every week with recurring buys.
How to buy Bitcoin →It's normal to have doubts before signing up. Here are the most-searched questions, each with a full answer.
How Proof of Reserves works, how to verify it yourself, and three settings that stop most account theft.
Read the safety guide →Regulation differs by country and OKX has restricted regions. Check before you sign up.
Read about regulation →Pick verified merchants, pay from your own account, never release crypto before the money arrives.
P2P safety tips →App availability depends on your store region. Here are the official links — and how to spot fake apps.
App download guide →Maker vs taker, VIP tiers, withdrawal network fees — explained, with a calculator.
OKX fees explained →Both are top exchanges. A fair comparison of reserves, features and service.
OKX vs Binance →One account for the exchange and a Web3 wallet. These are the six features beginners use most.
Published monthly. Verify with the Merkle tree tool that your balance is fully backed.
Buy USDT from verified merchants with local payment methods, then swap in one tap.
A multi-chain wallet in the same app, plus Jumpstart token launches and airdrop campaigns.
Practise spot and derivatives orders with virtual funds before risking real money.
Trading bots that execute for you: DCA, grid strategies, or follow experienced traders.
Live chat in the app and on the website for sign-up, KYC and deposit questions.
Tap a topic to jump to the guide. Every sign-up link goes to the official okx.com domain.
Still stuck? After signing up you can reach OKX's 24/7 live chat from the app.
Our OKX referral code (also called an invite code or promo code) is OK66688. Enter it when you register, or open okx.com/join/OK66688 and it is filled in for you.
Accounts registered with our code get a 20% discount on trading fees, permanently, on spot and derivatives, plus access to the new-user mystery box of up to 60,000 USDT. Exact rates and rewards are shown on OKX's official pages.
Open our referral link, choose email or phone number, confirm the referral code shows OK66688, enter the verification code and set a password. It takes about 3–5 minutes. Then complete identity verification (KYC) to deposit and trade. See the full OKX sign-up guide.
Usually not — the referral is linked when the account is created. If you haven't verified your identity yet, you can register again with a different email or phone number and enter OK66688. Never use someone else's identity to open an account.
OKX serves users in many countries, but some countries and regions are restricted, and in some places OKX operates through a local entity with its own sign-up flow. The registration page will tell you what is available where you live. See Is OKX legal?
OKX is one of the largest crypto exchanges and publishes monthly Proof of Reserves that you can verify yourself. No platform is risk-free, so turn on 2FA and keep long-term holdings in a wallet you control. Read Is OKX safe?
After KYC, use P2P trading or the “Buy crypto” options to purchase USDT with local payment methods, then use Convert to swap it for BTC or ETH. Available methods depend on your region. See How to buy crypto on OKX.
No. This is an independent sign-up guide. We don't offer logins, deposits or custody — everything happens on okx.com. We may earn a commission if you register through our link.
The referral can only be linked at registration — it can't be added later.