Forex currency pairs generally spend more time in very strong up or down trends than other markets, this is also a huge advantage because it is generally much easier to trade a strongly trending market than a chaotic and consolidating market. For example, most stock markets have a bullish bias, this means traders tend to like the long side or upside of the market more and as a result of this it is actually more difficult and generally requires more margin to sell short in a stock market. This is meant to control volatility, but because the futures market for currencies follows the spot forex market the next day at the futures open their sometimes will be large “gaps” or areas where the price has adjusted over night to match the current spot forex price.