Sessions crossovers arrive daily and the big one is always when the London forex market gets underway with the deepest liquidity. This is when the market makers are at their most active from 8am UK time with volatility, reversals and congestion following. Some of the traps are on high volume as the market makers participate, others on low volume, but all are clearly signalled with volume price analysis and the volatility indicator for MT4, MT5, NinjaTrader or Tradestation.