A broker offering execution with no requote, very high leverage up to 1:500 and allows scalping without restrictions. Suggest please
500:1 is what bucket shops offer. It's similar to you asking for an organization that engages in extortion, drug trade, and prostitution and gambling but it should not be the mafia.
You didn't mention for what securities but I assume you mean forex. https://55brokers.com/high-leverage-forex-brokers/
Use Forexchief. No requote, leverage up to 1:1000. I scalp without issues on this one. Use their $100 no deposit bonus to give it a try. No risk. Thank me later.