WHY NOT TRADING IN CURRENCY

CURRENCY TRADING 都是 Margin Trading (leverage)，杀红眼了一不小心就血本无归。

美国散户大都trade currency ETFs。主要的currency 都有ETFs，跟买卖股票一样。如你对欧元有兴趣，你可做多or 做空 FXE, 如果你觉的 1：1 玩不够刺激，你可玩 Double 输赢 的 ERO。

Margin Trading (leverage)
In contrast with other financial markets where you require the full deposit of the amount traded, in the Forex market you require only a margin deposit. The rest will be granted by your broker.
The leverage provided by some brokers goes up to 400:1. This means that you require only 1/400 or .25% in balance to open a position (plus the floating gains/losses.) Most brokers offer 100:1, where every trader requires 1% in balance to open a position.
The standard lot size in the Forex market is $100,000 USD.
For instance, a trader wants to get long one lot in EUR/USD and he or she is using 100:1 leverage.
To open such position, he or she requires 1% in balance or $1,000 USD.
Of course it is not advisable to open a position with such limited funds in our trading balance. If the trade goes against our trader, the position is to be closed by the broker. This takes us to our next important term.
Margin Call
A margin call occurs when the balance of the trading account falls below the maintenance margin (capital required to open one position, 1% when the leverage used is 100:1, 2% when leverage used is 50:1, and so on.) At this moment, the broker sells off (or buys back in the case of short positions) all your trades, leaving the trader "theoretically" with the maintenance margin.
Most of the time margin calls occur when money management is not properly applied.

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牛呀，哎，功夫好难造呀