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Position Sizing 头寸大小: Page 2 of 4

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Page 2 of 4 Calculating Position Sizes

Calculating Position Sizes

To make things easier for you to understand, as usual, we’ll be explaining everything with an example.

Calculating Forex Position SizesThis is Newbie Ned.

Long time ago, back when he was even more of a newbie than he is now, he blew out his account because he put on some enormous positions.

It was as if he was a gun slinging cowboy from the Midwest – he traded from the hip and traded BIG.

Ned didn’t fully understand the importance of position sizing and his account paid dearly for it.

He re-enrolled into the School of Pipsology to make sure that he understands it fully this time, and to make sure what happened to him never happens to you!

In the following examples, we’ll show you how to calculate your position size based on your account size and risk comfort level.

Your position size will also depend on whether or not your account denomination is the same as the base or quote currency.

Account Denomination the same as the Counter Currency

Newbie Ned just deposited USD 5,000 into his trading account and he is ready to start trading again. Let’s say he now uses a swing trading system that trades EUR/USD and that he risks about 200 pips per trade.

Ever since he blew out his first account, he has now sworn that he doesn’t want to risk more than 1% of his account per trade. Let’s figure how big his position size needs to be to stay within his risk comfort zone.

Using his account balance and the percentage amount he wants to risk, we can calculate the dollar amount risked.

USD 5,000 x 1% (or 0.01) = USD 50

Next we divide the amount risked by the stop to find the value per pip.

(USD 50)/(200 pips) = USD 0.25/pip

Lastly, we multiply the value per pip by a known unit/pip value ratio of EUR/USD. In this case, with 10k units (or one mini lot), each pip move is worth USD 1.

USD 0.25 per pip * [(10k units of EUR/USD)/(USD 1 per pip)] = 2,500 units of EUR/USD

So, Newbie Ned should put on 2,500 units of EUR/USD or less to stay within his risk comfort level with his current trade setup.

Pretty simple eh? But what if your account is the same as the base currency?

Account Denomination the same as Base Currency

Let’s say Ned is now chilling in the euro zone, decides to trade forex with a local broker, and deposits EUR 5,000.

Using the same trade example as before (trading EUR/USD with a 200 pip stop) what would his position size be if he only risked 1% of his account?

EUR 5,000 * 1% (or 0.01) = EUR 50

Now we have to convert this to USD because the value of a currency pair is calculated by the counter currency. Let’s say the current exchange rate for 1 EUR is $1.5000 (EUR/USD = 1.5000).

All we have to do to find the value in USD is invert the current exchange rate for EUR/USD and multiply by the amount of euros we wish to risk.

(USD 1.5000/EUR 1.0000) * EUR 50 = approx. USD 75.00

Next, divide your risk in USD by your stop loss in pips:

(USD 75.00)/(200 pips) = $0.375 a pip move.

This gives Ned the “value per pip” move with a 200 pip stop to stay within his risk comfort level.

Finally, multiply the value per pip move by the known unit-to-pip value ratio:

(USD 0.375 per pip) * [(10k units of EUR/USD)/(USD1 per pip)] = 3,750 units of EUR/USD

So, to risk EUR 50 or less on a 200 pip stop on EUR/USD, Ned’s position size can be no bigger than 3,750 units.

Still pretty simple, eh?

Well now it gets slightly more complicated.

Don’t worry though. The FX-Men got yo’ back and we’ll explain everything so it’ll become as easy as baking a cake.

计算头寸规模

为了让事情简单易懂,与往常一样,我们将举例说明每件事。

这是新手张三。

很久之前,他是个比现在还要青葱的新手。由于他使用的头寸规模巨大,他损失了整个账户。

他就像个从中西部来的牛仔——不用脑子交易,还大规模交易。

张三并未全面理解头寸规模的重要性,他的账户为此付出了沉重的代价。

现在他重新开始了学习课程,并确保自己完全理解了相关内容。别让发生在他身上的事在你身上重演!

在下列例子中,我们将向你展示如何基于你的账户大小和适宜的风险水平计算头寸规模。

你的头寸规模还取决于你的账户的币种是基础货币还是报价货币。

账户币种为相对货币

新手张三往他的交易账户中存入了5000美元,他准备好再次开始交易。假设他使用的是用来交易欧元/美元的波段交易系统,每次交易他冒200点的险。

自从损失了第一个账户,他发誓每次交易不会拿高于账户1%的金额冒险。让我们来计算一下在他的风险适宜区里,他的头寸规模应该是多少。

通过他的账户余额和他所希望的账户风险比,我们可以计算出风险数额。

5000美元X 1%(或0.01)=50美元

接下来,我们用风险数额除以止损得出每点价值。

50美元/200点=0.25美元/点

最后,用每点价值乘以欧元/美元已知的单位/点价值比。在这个例子中,1万单位(或一迷你手),每点变动价值为1美元。

0.25美元/点*[(1万单位欧元/美元)/(1美元/点)]=2500单位欧元/美元

所以,新手张三应交易2500单位欧元/美元或更小的数目以便在现有账户设定下处于适宜的风险水平。

很简单哈?但要是你的账户币种为基础货币呢?

账户币种为基础货币

假设张三现在呆在欧元区,决定通过当地经纪商进行外汇交易,账户总额为5000欧元。

还用之前的例子(交易欧元/美元,止损设定200点),如果他只愿意拿账户总额的1%冒险,他的头寸规模应该是多少?

5000欧元*1%(或0.01)=50欧元

现在我们要把它换算为美元,因为货币对是以相对货币计价的。假设现有汇率为1欧元可兑换1.5000美元(欧元/美元=1.5000)。

我们得出了换算为美元的价值,就要转换欧元/美元的现有汇率,再乘上我们愿意拿来冒险的欧元总额。

(1.5000美元/1.0000欧元)*50欧元=约为75美元

接下来,用以美元计算的风险除以止损点数。

(75美元)/( 200点)=0.375美元/点

这给出了止损设定200点,在张三适宜风险比之内的“每点价值”。

最后,用每点价值乘以已知的单位/点价值比:

(0.375美元/点)*[ (1万单位欧元/美元)/(1美元/点)]=3750单位欧元/美元

因此,冒50欧元或更小的险,以200点止损设定交易欧元/美元,张三的头寸规模不能超过3750单位。

仍然很简单,哈?

现在它变得复杂点了。

别担心。我们会解释一切,让它变得和烤蛋糕一样容易。