Wallet Transactions - Buy or Sell

Hi, I really love your site. Can you please confirm how you determine if a wallet transaction is a Buy or a Sell. I mean, each transaction is effectively a swap of one token for another. I’m really interested in how you can determine a Buy from a Sell. For example, this page…
https://dexcheck.ai/app/address-analyzer/0x268c824be6856348a0c8a57f3f14573e16057fdd?tab=trading-history