When choosing a share dealing platform, first consider the investment and account options available. For example, not all U.K. brokers offer ISA and SIPP accounts, nor do all U.K. brokers support U.S. shares trading. Next, compare the trading fees and any monthly or quarterly account fees. Finally, assess the trading platforms themselves by comparing the mobile apps, trading tools, and available market research. Ease of use is another area you may want to consider if you are a new trader.