This question cannot be answered unequivocally, because the range of different offers is wide. Some brokers even offer the entry at zero cost, so that you can open an account without any equity. Any deposits are then possible. Other brokers offer very low minimum deposits.
These can be in the range of a few euros up to 100 euros. The wide midfield extends over an entry amount between 250 euros and about 1000 euros. Brokers, which require a minimum deposit of up to 5000 euros, are more suitable for experienced traders, because here the purchase prices are set relatively high. The minimum deposit depends very much on the ratio of the leverage and the pips. As a rule, the higher the pips, the more equity must be raised.
However, you can not rely on this formula, because some brokers offer particularly favorable conditions just here. The ratio of the leverage also has a significance. The higher this ratio, the lower the minimum deposit is usually. However, this statement is not completely true, because some brokers require particularly high minimum deposits, because they assume that the leverage is used extensively.
In principle, all persons who have reached the age of 18 and have unlimited legal capacity can participate in Forex trading. No special approval by a regulatory authority is required for this, because a private trader always acts at his own risk. Also, no trade has to be registered, however, the returns are taxable under law and must be declared as capital gains.
Furthermore, companies can also participate in the Forex business. However, these require a license from an appropriate authority and must be registered as financial service providers.
Many transactions in the Forex market are conducted directly among banks. Of course, as financial service providers, can also be active in the Forex market. An essential criterion to be able to participate in Forex trading is, of course, a sufficient amount of capital. This also applies to private individuals, but they trade on their own account, so they themselves are responsible for whether they can finance such transactions. A check by brokers, for example whether a trader is registered does not exist, because the trader accounts are managed on a prepaid basis.
However, traders who have been convicted of a crime in connection with Forex trading are an exception. Many brokers keep corresponding databases, so that a new registration is no longer possible for this group of people. However, this usually only applies to one broker and not to all.
