Need a backtesting library

Hello Everyone,

My name is Jack and I run a very small firm (<5 people). I am looking for a backtesting library that can be integrated in an existing product. I am building a charting software and wish to include backtesting functionalities.

For e.g. fmlabs is a company that sells dll that can be used in an existing product. However their library is old and has some bugs.

Can anyone suggest similar libraries that support backtesting and optimization. My program will be developed in .net and will be a windows application.

Thank you,

Regards,
Jack

I have a home made proprietary backtesting and optimisation library.

What does your company do ? If you have 5 employees it wouldn't be too hard to build one from scratch.