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In my city i dont know of any trading firm reinventing a database or datastore. They use an existing solution.

Most use existing software like spark or hadoop. Nosql databases. Job schedulers. Rarely do you see a firm ,let alone a hedge fund ,write these from scratch which is the interesting development piece. Using these tools is mundane ETL that can be outsourced to someone like yourself for peanuts

that actually would be cool. And if someone wrote a system like that I am certain they could get a job in trading. It shows ability to be creative and think uniquely unlike all the how to store tick data, backtest, big data bs

integrated combining or coordinating separate elements so as to provide a harmonious,interrelated whole I want to wear occulus gear and see the market, positions, orders all around me. I want to be able to motion my hands and buy/sell/cancel. I haven't seen anyone do this.

are they integrated with a trading platform?

this firm tracks twitter and sites ... http://www.seleritycorp.com/ You should lower your ambitions and just do something simple and sell it or lease it in high volume. And by simple I mean something so easy you might think no one wants it. If you want to go down the interesting path then...

Convert back with exp()

trolling is ingrained in ET

from my location, the trading firms like to reinvent the wheel or use an off the shelf product like TT, optioncity, orc ... What you're proposing seems to target the firms that write their own stuff and they always think they are really fast

if you own an ETF then you're long several competitors

There's limited demand. What's your website?

Its not a secret. You can easily google it

most of the volume in european etfs is over the counter

How much you willing to pay? I can give you all the signals you want

here's a java version if python isnt your thing http://bit.ly/IBorderbuilderJava

well historical var just runs over historical data and you look at worst cases... when shit hits the fan and correlations all go to 1. i dont know about changing correlations; maybe that can be done in a montecarlo approach when you bump a variable and rerun but thats a guess

Run historical riskvar over your portfolio. Or run various margin whatif scenarios

http://j.mp/iborderUtil

you just set create a new order and set m_parentId to the initial order def createBracketOrder(origOrder, oID, tif, orderType,price): bracketoptOrder = Utils.makeOptOrder( Side.flipside(origOrder.m_action), oID, tif, orderType,price,origOrder.m_totalQuantity) bracketoptOrder.m_parentId =...

Oh i didn't read the post correctly. I thought he wanted to creat am app and sell it for 100 bucks. Yes you need to register as a cta/cpo i think