Hello [I]Corriston,[/I] and welcome to this forum.
So far, this thread has failed to address the most important points regarding leverage:
B The term “leverage” has two different meanings, and in any discussion you need to be clear about which type of leverage you are referring to.
B[/B] The “leverage” your broker offers (and advertises) is the maximum amount of leverage he will allow you to use. That’s why I refer to it as MAXIMUM ALLOWABLE LEVERAGE.
In almost all cases, brokers calculate MARGIN this way:
Required margin = 1 ÷ maximum allowable leverage.
If you play around with that formula, you will realize that [I]higher[/I] maximum allowable leverage corresponds to [I]lower[/I] required margin. And lower required margin is a good thing. So, as a general rule, you are better off with high maximum allowable leverage.
Don’t shy away from accepting 500:1 (or even 1000:1) maximum allowable leverage from your broker. Just because he allows you to use outrageous amounts of leverage — that doesn’t mean you must, or should, use those amounts of leverage. But, regardless of how much leverage you actually use, you will benefit from [I]higher[/I] maximum allowable leverage, because on every position which you take, your broker will set aside a [I]smaller[/I] portion of your account as required margin.
If your broker offers 500:1 maximum allowable leverage, then he will require only 1/5 of 1% of the notional value of your position as required margin — according to the formula,
Required margin = 1 ÷ maximum allowable leverage = 1 ÷ 500 = 0.002 = 1/5 of 1%.
Let’s say you take a position with a notional amount of one standard lot (100,000 units of currency), and let’s say that your position has a notional [I]value[/I] of $100,000. Your broker will require (set aside) margin of $200. This amount will be out of your reach, and unavailable for you to use or withdraw, for the duration of your trade.
If, on the other hand, your broker offers maximum allowable leverage of only 50:1 (which happens to be the maximum amount legally available in the U.S.), then the margin required on your 1-lot position will be $2,000 (instead of $200). That difference may be significant to you, depending on the size of your account, the way you trade, and your money management rules.
B[/B] Which brings us to the second “type” of leverage — the amount of leverage you actually use. You control this leverage, yourself. If you take positions which are too large for the size your account, then your ACTUAL LEVERAGE USED will be inappropriately large. On the other hand, if you trade prudently, your actual leverage used will be small — probably extremely small compared to the maximum allowable leverage offered by your broker.
The formula for calculating the actual leverage used in any trade is:
Actual leverage used = position size ÷ account size.
If you have a $20,000 account balance, and you take the 1-lot position described above, then
Your actual leverage used = $100,000 ÷ $20,000 = 5 (meaning 5:1 actual leverage used).
Most small retail traders (like ourselves) use actual leverage ranging from 5:1 to 10:1 (based on [I]all[/I] positions open at any one time). Some very conservative traders typically use less than 5:1 actual leverage. At the other end of the spectrum, some forex portfolio traders use actual leverage approaching 30:1 — but, the risks associated with portfolio trading are different from the risks associated with other trading methodologies, so portfolio trading involves money management rules which are very different from other styles of trading.
As previous replies to your question have indicated, controlling your risk on every trade, and controlling your overall risk when you have multiple open trades, automatically limits the actual leverage you are using, so that generally you don’t even have to think about the amount of leverage you are actually using, and you almost never have to use the formula given above.