More indices in Derive.com Crash/Boom and step indices are now available for round-the-clock trading with multipliers on DTrader. Crash/Boom 1000 Predict and gain from simulated markets that average one dip (Crash) or spike (Boom) in prices every 1000 ticks. Crash/Boom 500 Want more volatility? Crash or Boom occurs twice as frequently compared to Crash/Boom 1000. Step indices Trade a simulated market with an equal probability of up or down movement in price series with a fixed step size of 0.1.