 The new route also takes advantage of the faster speed of signal travel that is possible through air (compared to signal travel speed through glass fibers, which slows light down).With these two advantages, this new link shaved 4.5 milliseconds off the Spread Networks speed, thereby rendering it obsolete.Manoj Narang, CEO of high-frequency trading firm Tradeworx, argued that Lewis' book is more "fiction than fact," claiming Lewis needs a primer in HFT.