What is demat day trading? Is day trading different from intra day trading? What is the percentage of the brokerage fee? Demat trading is a stupid word. Forget about it. It'll be obsolete soon. Demat trading is trading of shares in electronic or dematerialized form. Back in the cave man days when you were physically sent stock certificates, you might use the term demat, but today trading in electronic form is so prevalent as to make the term demat obsolete. Intra day trading is just another phrase for day trading.