Conduct extensive research, since a claim of lower dealing spreads does not always suggest that a forex broker offers the lowest trading costs for your specific strategy. Keep an eye out for the following situations:

Many brokers provide different spreads for different currency pairings and account types. Certain accounts may attract traders by offering a reduced dealing spread in exchange for a high charge. Make sure you are aware of any transaction costs.

Be wary of brokers who guarantee a set spread. It might imply that the spread is wider than normal, that you will incur higher trading fees, or that the broker is trading against you as a market maker. Some brokers with low spreads may require a significant minimum deposit.
When choosing amongst brokers with the best spreads, look for those who are licenced in your nation. If a problem arises, it is far easier to rectify it in your own country. Trading with brokers who provide a rapid and low-cost means of local payment can also save you money on deposit, withdrawal, and currency conversion costs.