The Basic Theories with SigmaForex

• The Basic Theories

Purchasing Power Parity

The PPP theory states that exchange rates are determined by the relative prices of similar baskets of goods. Changes in inflation rates are expected to be offset by equal but opposite changes in the exchange rate. Take the classic example of hamburgers. If the burger costs $2.00 in the US and £1.00 in the UK, then according to PPP, the £-$ exchange rate must be 2 dollars per one British pound.

If the prevailing market exchange rate is $1.7 per British pound, then the pound is said to be undervalued and the dollar overvalued. The theory then postulates that the two currencies will eventually move towards the 2:1 relation.

PPP's major weakness is that it assumes goods are easily tradable, with no costs to trade such as tariffs, quotas or taxes. Another weakness is that it applies only for goods and ignores services, where room for differences in value is significant. Furthermore, there are several factors besides inflation and interest rate differentials impacting exchange rates, such as economic releases/reports, asset markets and political developments. There was little empirical evidence of the effectiveness of PPP prior to the 1990s. Thereafter, PPP was seen to have worked only in the long term (3-5 years) when prices eventually correct towards parity.

• Stop Order Execution

Volatile market conditions can result in prices gapping, which may prevent the execution of stop orders (sell stop, buy stop, stop loss) at the price you initially requested. However, our dealers strive to execute all stop orders at the price, or failing that, at the best attainable rate the market allows.

• Lot Types

Sigma Forex has generated an ultimate account type that allow you to trade Standard, Mini and Micro lot in the same account which is Sigma Account to make it more simple and easy for traders.

• Multi Currency Denomination

Sigma offers the ability to set-up accounts denominated in the following currencies:

• United States dollar (USD)
• Euro (EUR)
• Great Britain pound (GBP)
• Australian dollar (AUD)
• Swiss Frank (CHF)

There is no minimum deposit for opening an account, in order to review the spreads, pip value & margin requirement choose the required pair, leverage & the lot type.