I have trading strategy that is based on orderbook analysis. Trades happen quite rarely so Iâd like to trade as much stocks as possible, preferably 1000-1500 sctocks on NASDAQ. Now choosing an API and broker to implement the strategy. Internet channel bandwidth is not a problem because Iâll colocate. Strategy logic is simple and doesnât require a lot of calculations. Hardware: P4 3.4 + MS Workstation 2003. What API can keep up with 1000-1500 real-time orderbooks on this hardware? Or, how many orderbooks can be updated real-time with a given API on this hardware? If youâve experienced the same problem write number(or your best estimate of it) of orderbooks your specific API-hardware combination can keep up with.