One of the things that affects the spread of the liquidity level and the volatility of a pair, say at the time of the liquidity is high in small spreads, as well as the opposite at the small liquidity of a large spread spread, seen at the time of the open market morning spread and on weekends. Low liquidity level. Regarding spread there are 2 options, including fixed spreads and floating spreads. Where has the advantages of masoing ... depending on the trading plan used.