The "PDT" (Pattern Day Trading) policy, approved by FINRA (Financial Industry Regulatory Authority) in 2001, aims to protect investors from substantial losses. The key requirement of the pattern day trading rule is that a trader must maintain a minimum equity balance of $25,000 in a margin account to engage in pattern day trading.
However, it's important to note that the "PDT" rule does not apply to your Trading 212 account.