First, read the English article below.

You’ll need this to convert into other currencies. Free up cash by selling your other assets. Consider selling stocks, bonds, or mutual funds, or take money out of a checking or savings account. In most cases, individual investors use a brokerage service to place their foreign currency transaction.  Online broker OANDA offers a user-friendly retail platform called fxUnity for novices that want to buy and sell foreign currency.   The online brokerage firms Forex.com and TDAmeritrade also allow you to trade on the Forex market. Forex brokers don't charge traditional commissions or fees. Instead, they make money off the spread, which is the difference between how much a currency can be sold for and bought for.  The higher the spread is, the more money you pay to the broker. For example, a broker that will buy a U.S. dollar for 0.8 euros but sells a U.S. dollar for 0.95 euros has a spread of 0.15 euros.  Before you sign up for a brokerage account, check its website or the website of its parent company and ensure it’s registered with the Futures Commission Merchant and regulated by the Commodity Futures Trading Commission. You should be able to track the progress of your investments with visual software or other resources. Do not "overtrade," or purchase too much currency at once. Experts recommend sticking with investing between 5% and 10% of your total account balance in any single currency trade.  Pay attention to currency rate trends before you make the transaction. You have a better chance of making money if you trade with the trend than against it. For example, say that the U.S. dollar has been steadily rising in value against the euro. Unless you have a good reason to think otherwise, you should choose to sell euros and buy U.S. dollars. Stop-loss orders are a crucial part of currency trading. A stop-loss order will automatically exit a position -- i.e., sell off your trade -- once it hits a certain price. This limits the amount of loss you take if the currency you purchased begins to take a nosedive.  For... 

Now, please write a short abstract for it in Chinese. Abstract:
获取本地货币的现金。 寻找外汇经纪商。 寻找低点差的经纪商。 开始向经纪商下单。 设置止损订单。 记录交易成本基础。 限制货币交易数额。