What Is the 90% Rule in Forex?

In foreign exchange markets, the 90% rule asserts that 90% of new forex day traders will fail to make money. Some versions are even more specific, claiming that 90% of day traders will lose 90% of their capital within the first 90 days. Although the evidence is largely anecdotal, the 90% rule serves as a cautionary idiom for the volatility and complexity of foreign exchange markets.