My fourth day to write in Englis

I have the idea of writing stocks, in fact I am really fresh about it. that's a challenge for me.

there are some key words i need to list for better understanding: security, stock exchange, trading,broker

Broker plays an important role in both stock market and insurance market.They  provide the professional service for their customers and make commissions from them.

Brokers typically work in brokerage firm. They acted as middlemen between buyers and sellers.Their professional advices are crucial for clients on the complicate market.

So clients will prefer to choose professional brokers even paying for a lot of monkey.