I have downloaded the Dukascopy tick data and I have decompressing it with easylzma library. The original compressed binary file is EURUSD/2010/00/08/12h_ticks.bi5 (EURUSD/2
ii1 is seconds within this hour
ii2 is Ask * 10000
ii3 is Bid * 10000
ff1 is Ask Volume
ff2 is Bid Volume