A few forex & CFD brokers in the world maintain offices in Ireland in order to serve the local trading community there. And as with brokers in countries in the rest of the world, many of the forex brokers in Ireland offer the MetaTrader 4 (MT4) as one of the trading platforms their clients can choose to use.
Ireland is a part of the EU, and Irish forex brokers are therefore required to follow regulations issued by the European Securities and Markets Authority (ESMA). Among other things, this means that all brokers must offer negative balance protection to their traders, and that leverage is limited to 1:30 at most. Traders who want higher leverage than that should therefore instead look for a broker outside of the European Union, such as in Switzerland, New Zealand, or in various offshore jurisdictions.