we need to do tests, and validate if it allows you to send from this binance wallet, remember to validate the contract number

Dear big shots, this is the price of SLX on the Binance and OKEx platforms. The price difference between the two platforms is as much as 3 times. If I buy coins on the cheaper platform and transfer them to the higher-priced platform to sell, wouldn't I be making a fortune? What do I need contracts for?