Live Spreads Widget: Dynamic live spreads are available on Active Trader commission-based accounts. When static spreads are displayed, the figures are time-weighted averages derived from tradable prices at FXCM from July 1, 2018 to September 30, 2018. Spreads are variable and are subject to delay. The spread figures are for informational purposes only. FXCM is not liable for errors, omissions or delays, or for actions relying on this information.

If you place a trade in the EUR/USD, buying or selling one micro lot, your stop loss order must be within 10 pips of your entry price. Since each pip is worth $0.10, if your stop loss order is 11 pips away, your risk is 11 x $0.10 = $1.10, which is more risk than you're allowed. Therefore, opening an account with $100 severely limits how you can trade and is not recommended. Also, if you are risking a very small dollar amount on each trade, by extension you aren't going to make very much money. Depositing $100 and hoping to draw an income just isn't going to happen.
An exchange rate can suffer rapid changes, sometimes several times a second, so there’s a lot of action going on 24 hours a day, 5 days a week. In general, the currency exchange rate reflects the health of an economy in comparison to others. If the economies of the Eurozone are doing better than the US economy, the euro will go up compared to the dollar (EUR/USD ↑) and vice-versa.
One unique aspect of this international market is that there is no central marketplace for foreign exchange. Rather, currency trading is conducted electronically over-the-counter (OTC), which means that all transactions occur via computer networks between traders around the world, rather than on one centralized exchange. The market is open 24 hours a day, five and a half days a week, and currencies are traded worldwide in the major financial centers of London, New York, Tokyo, Zurich, Frankfurt, Hong Kong, Singapore, Paris and Sydney - across almost every time zone. This means that when the trading day in the U.S. ends, the forex market begins anew in Tokyo and Hong Kong. As such, the forex market can be extremely active any time of the day, with price quotes changing constantly.