It is in your interest to have more than one trading account. It is advisable to have two trading accounts, one with a full-service broker and other with a discount broker.
Both the accounts have their own Pros and cons. To take advantage of the positive things of both types of brokers i.e. A full-service broker and a discount broker, one should have accounts with both. Usually, a full-service broker is good in research and market updates, where a discount broker is good in low brokerage model.
if you already have an account with a full-service broker like most of the investors and traders have, then you can keep your current account and can open one more account with a discount broker.
Trading account with a full-service broker may come handy to enjoy the extended services like research and analysis, tips and recommendations, investing in IPOs, Mutual funds, Forex FDs, Bonds, and Insurance.
Thus by keeping both the account you can save brokerage by 70 to 90% in your day to day trading as well as take advantage of all the investment options.
A second big advantage which we can say is, in case of technical issue with one broker you have the option to hedge the trade with a second account.
Diversify your portfolio within the brokers, in case one broker is good in one type of service and another in another service you can diversify your portfolio.