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I am aware we are comparing three different types of instrument; with different tick sizes and multipliers. That being said if you adjusted for the difference in the multiplier between the different instruments how do the three stack up against each other when it comes to accessible liquidity...

So would you say in essence, particularly the 217.5-219.5 strikes, are being sold at what represents almost a pure profit by the market maker. If that is the case is there a feasible means of calculating at which point the residual value stops becoming effected by theta and reasonable...

Sorry ...image updated.

As a general concept I understand how Theta and Vega work, but when it comes to DEEP OTM strikes I don't completely understand the practical effects. Looking at the attached image it would appear that 1 day of time passage and/or a decrease in volatility should completely wipe out the last...

On it's face value assuming you could pin price at expiration the single calendar would obviously be the more efficient ROC scenario, but as is well known things rarely go as planned. I've seen a fair amount of comparisons of the single versus double spreads and am familiar with the tradeoffs of...

Regarding the effects of SPAN margin when trading options on futures, there seems be some noticeable benefit for certain scenarios, although a great deal of the information out there seems to revolve around the generalities of SPAN and using it with naked strategies. I am interested in a better...

Interesting to read similar thoughts from Rotter. Likely due to the size he was trading and familiarity with the subject he was mindful his activity could possibly be parsed by interested parties be it the broker, clearing house or etc., which was partially the motivation for using multiple...

EnergyTrader - I guess without knowing the extent or ease of access to the analytics it would be hard to determine the feasibility of parsing the standouts. BTW - Thanks for responding to Maverick74's tangential inquiry.

People continue to mention the trading regulations on the employee which would seem easily surmountable through the use of an unrelated 3rd party. Frankly you would be a fool as a brokerage employee to personally attempt to trade it yourself especially while still under the employment of the...

Thanks for the additional clarification. Would you say the broker neutral platform adds some practical level of anonymity that couldn't be had in a monopolized environment like TOS, TradeStation or similar, where they serve as both the platform provider and brokerage?

I am not trying to debate whether it does or doesn't occur. My interest is in feasible measures that can be taken to lessen one's exposure to it becoming an issue to begin with. "Traders/Institutions that move around a great amount of capital don't use retail brokers. They would use a...

moonmist - Interesting threads, but it seemed like it was pretty much agreed it could be done if someone wanted to take the risk of possibly being caught. Almost always the onus would be on the victim to prove it had been done, which puts them in disadvantageous position very similar to your 2nd...

What prevents a brokerage or a rouge brokerage employee with the right access from shadowing the trading concepts of above average performing accounts? I've seen this question approached from different angles a couple of times on ET, but more often then not it is dismissed with a variety of...

Really anything not proprietary.

I agree with you about keeping the "secret sauce" underwraps that just makes good sense. That part generally accounts for such a small relative portion of system design there shouldn't be any reason the other 95% can't be discussed. Whats interesting to me is you take a retail platform where...

Risk619, Very well put. It would be nice if someone would start a sticky in this forum where a lot of these core design choices could be expanded upon to create a common resource. As it stands now when you read through the forum there are a lot of fragmented conversations on the same topic but...

I personally really like the idea of using Python, its so readable even programmers not very familiar with it can fairly easily follow the logic. And if you do happen to need a component rewritten in C++ or similar for pure speed being a glue language the high speed version fairly easily plugs...

Anyone that has been around trading for a little while has no doubt been exposed to the constant "Which is the the better platform for ..." debate. Most retail platforms appear to be designed as discretionary platforms that to varying degrees support some level of automation. Whether that level...

Hypothetically the mandate would be to execute the desired volume at every price level to obtain optimal granularity and pacing, but in reality if you could use an iceberg order with child orders to control the desired entry pace it would be achieving a similar end result. Tick functionality...

Yes, ideally a 1 unit position every $.01 between $100-$101. The challenge is entry granularity so even though you could effectively arrive at the same result (final average entry price of $100.50) through a wide variety of different entry combinations that is not the task. Obviously there are...