Update

I can't believe it's been two months since I last posted... wow, time has a way of slipping through my fingers.  Here's a short list of some upcoming posts:

• An introduction to LSPM -- a new R package that implements Ralph Vince's leverage space portfolio model (co-authored with Soren Macbeth).
• Updated charting with quantmod.
• An introduction to blotter -- a transaction-based infrastructure for trading systems and simulation, providing support for multi-asset class and multi-currency portfolios.