Welcome to prokopyshen.com

I am an independent Information Technology consultant providing design, build, engineering and programming services.  I have extensive experience in the design and operation of LAMP-stack web hosting, DNS administration, SSL certificates and internet application hosting for small, medium and enterprise clients.  One of my key services is troubleshooting performance issues starting with MySQL slow query analysis and reviewing all aspects of the LAMP stack including optimal use of Content Delivery Networks like Amazon Web Services (AWS) Cloudfront service.  If you are hosting at AWS, or running a private cloud using XEN, or just need some assistance with linux/Solaris/network system administration please Contact Me.
I can also provide tutoring, troubleshooting, code walk throughs, consulting and programming service for your automated trading algorithm to run either in Quantopian's python web trading system or for validation work using Quantopian's Research Environment or their offline open source zipline back tester facility.  Contact Me with your quantatitive finance requirements.
If your business - especially startups - is located in Michigan's Oakland County Automation Alley , please send me a mail for networking purposes so we can get to know each other.
In my blog I write about my experiences with Arduino, classic stereo equipment , quantitative finance and the web hosting business of Daily Fantasy Sports .
For more information on services or availability please  Contact Me .

Review : Stanford University Andrew Ng’s Machine Learning course at Coursera

I found this online course to be interesting, challenging, practical and it gave me some fresh ideas about problem solving using numerical methods.

What I liked most:

1) The lecture videos directly tied into the programming exercises.  You had a chance to directly try out what you just learned by programming it.

2) The automatic scoring/review of your programming assignments with the submit script was a great way to get instant feedback.

3) I was never bored listening to Andrew talk.  He worked very hard in making this material.

markit Excel plugin and slow spreadsheet loading recalculations

IHS Markit is one of the premium data providers for quants around the globe.  One of the mechanism that this data can be accessed is via an Excel plug-in.

An interesting problem can arise with any asynchronous plug-in (not just Markit) that can lead to Excel spreadsheets not loading correctly or recalcuations that never complete.  Let's explore the situation that I encountered !


Using zipline and ta-lib to create input data for alphalens

Quantopian's open source python stock trading simulator zipline is very powerful and now comes with a mechanism to run daily bar simulations against over 3000 symbols from the quandl library.  It also provides flexible support to many libraries including classic technical analysis indicators.   Now a new tool can be used to more formally evaluate your trading signal.



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