Trading Forex, Commodities..

FOREX is foreign exchange trading i.e. currency pairs. E.g. USD/CAD. How much CAD for 1 USD. You can trade long or short.

For forex investing there are several platforms.
One that is easy to setup and use if OANDA.

You can trade over 100 instruments in this platform
Forex, Commodities, Indices, Bonds, Metals.

You can open an account with as low as $100 and trade in major currencies.
The starting margin is 1:50 and the more capital you put the greater the
margin can be.

You can trade from mobile or desktop. They also have MT4 trading terminal.
They give alerts and news that can guide your trading decision.

You can start with a Practice account and then convert to live account.

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