Trading bots and monetary congestion at the exchange

The Redneck model a trading bot for each trader that manages bid and ask.  The even money bot will simply keep all its bid and ask within one sigma of the spread, as observed by the pit boss in the published current odds. So, regardless of how the exchange performs a match, ti will have the even money trading bot to match. The even money will get you a price within one TU of the previous best estimate.

Traders with inside information use the high risk trader, it can buy and sell within 1.5 deviations of the posted stats.  These bots cause the bid and ask stacks to stay within some bound, when viewed as in and out queues.  Trading bots, legally, morally and mathematically separate out the 'who is responsible for what' rules. The bots themselves are simple contracts, essentially, on what basis is the price acceptable.

A whole bunch of legal issues go away when each bot gets fairly priced access to the dual stacks, or some contracted summary of the stacks.  Today, in the large established exchanges, the managing broker is increasingly vulnerable to lawsuits caused by HFTers, as the large brokers now understand congestion over distribution channels. Failure to implement the bot model is an obviously distorted TU process.

Patents? 
None since this is an obvious, and exact implementation of real people at an auction.  So, my patent rule says, if a Redneck trading pit were implemented in cardboard, and the real human pit implemented in cardboard; they would be identical designs, unpatentable.

Easy to use
The Redneck reference specifies secure python, and it comes with fair scheduler and obeys contracts.  The pit boss actually holds custodial cash when needed to operate as a side chain. The system is compose of a few types of bot, each having a simple rule surface.  The pit operator deliberately disowns the bots, they are public domain. They can be passed up for testing all we want. The exchange operator keeps the three most popular available for standard trading.

Need a ledger service?
Sure, when the bots check in and out; or as often as specified in the token contract for the currency in question.  I suspect that big chunks of bitcoin will be traded as a side chain at the pits, and spent as, say, BofA BTC, meaning the BofA S&L machine will trader and block chain them as needed.