How to Use a DEX Safely: Three Checks Before Every Trade
On-chain trading has no safety net; security is on you. Check the domain before connecting, check permissions before signing, start small — three habits that block most on-chain accidents.
Step 1: Check the Domain Before Connecting
The number-one killer in on-chain trading is fake sites. Search results and Twitter ads are full of look-alike domains; connect a wallet and sign on a phishing site and funds can vanish instantly. Rule: enter only via the project official pinned tweet or docs, bookmark the correct URL, and from then on use the bookmark only. One wrong letter in the address bar means leave — no DEX support desk recovers phished coins.
Step 2: Understand What You Sign
Do not blindly confirm wallet pop-ups. A transfer signature clearly shows amount and recipient; an "approve" signature grants a contract permission to move one of your tokens — malicious contracts often use unlimited approvals to drain balances. Build the habit: cap approval amounts to what this action needs, and periodically revoke stale approvals with an allowance checker. Any signature you cannot read, reject.
Step 3: Start Small and Low-Leverage
The first time on any DEX, run the whole flow small: bridge in, place an order, close it, withdraw — confirm each step lands before scaling up. Majors on perp DEXs rival big-CEX depth, but long-tail books are thin and a market order slippage can dwarf the fee. Same for leverage — learn the liquidation mechanics at 2-3x before going bigger.
