Richness in the context of foreign exchange (forex or FX) typically refers to the relative value or wealth of one currency compared to another、However, this term is not commonly used in forex trading or financial markets.

More often, traders and analysts might discuss concepts like:

1、Currency strength: How powerful or valuable a currency is compared to others.
2、Interest rates: Higher interest rates can increase the attractiveness of a currency.
3、Economic indicators: Strong economic performance can increase a currency's value.
4、Inflation rates: Lower inflation generally increases a currency's value.
5、Political stability: More stable countries tend to have stronger currencies.

If you meant something else by richness in forex, please provide more context so I can give you a more accurate answer.