Articles by Joshua Ulrich

Estimating Probability of Drawdown

June 19, 2010 | Joshua Ulrich

I've shown several examples of how to use LSPM's probDrawdown function as a constraint when optimizing a leverage space portfolio.  Those posts implicitly assume the probDrawdown function produces an accurate estimate of actual drawdo... [Read more...]

LSPM Joint Probability Tables

May 18, 2010 | Joshua Ulrich

I've received several requests for methods to create joint probability tables for use in LSPM's portfolio optimization functions.  Rather than continue to email this example to individuals who ask, I post it here in hopes they find it via a Google...
[Read more...]

Thoughts on LSPM from R/Finance 2010

April 18, 2010 | Joshua Ulrich

I just got back from R/Finance 2010 in Chicago. If you couldn't make it this year, I strongly encourage you to attend next year. I will post a more comprehensive review of the event in the next couple days, but I wanted to share some of my notes spec...
[Read more...]

Maximum Probability of Profit

April 9, 2010 | Joshua Ulrich

To continue with the LSPM examples, this post shows how to optimize a Leverage Space Portfolio for the maximum probability of profit. The data and example are again taken from The Leverage Space Trading Model by Ralph Vince. These optimizaitons take ...
[Read more...]

TTR_0.20-2 on CRAN

March 30, 2010 | Joshua Ulrich

An updated version of TTR is now on CRAN. It fixes a couple bugs and includes a couple handy tweaks. Here's the full contents of the CHANGES file:TTR version 0.20-2 Changes from version 0.20-1NEW FEATURES:Added VWAP and VWMA (thanks to Brian Peterson...
[Read more...]

Updated Tactical Asset Allocation Results

February 6, 2010 | Joshua Ulrich

In November, I used the strategy in Mebane Faber's Tactical Asset Allocation paper to provide an introduction to blotter. Faber has updated the strategy's results through the end of 2009. For those interested, he expands on the paper in his book, The...
[Read more...]

R/Finance 2010: Registration Open

February 5, 2010 | Joshua Ulrich

As posted by Dirk Eddelbuettel on R-SIG-Finance: R / Finance 2010: Applied Finance with R April 16 & 17, Chicago, IL, US The second annual R / Finance conference for applied finance using R, the premier free software system for statistical comput...
[Read more...]

LSPM with snow

January 10, 2010 | Joshua Ulrich

My last post provided examples of how to use the LSPM package. Those who experimented with the code have probably found that constrained optimizations with horizons __ 6 have long run-times (when calc.max __= horizon).This post will illustrate how the s...
[Read more...]

LSPM Examples

January 2, 2010 | Joshua Ulrich

I have received several requests for additional LSPM documentation over the past couple days and a couple months ago I promised an introduction to LSPM. In this long-overdue post, I will show how to optimize a Leverage Space Portfolio with the LSPM pa... [Read more...]

Tactical asset allocation using blotter

November 18, 2009 | Joshua Ulrich

blotter is an R package that tracks the P&L of your trading systems (or simulations), even if your portfolio spans many security types and/or currencies. This post uses blotter to track a simple two-ETF trading system. The contents of this post b... [Read more...]

opentick alternatives

November 5, 2009 | Joshua Ulrich

I've been getting a bit of traffic from people searching for opentick (the defunct company), so I've started a list of similar (but non-free) data providers. I'm not affiliated with any of these vendors, and the list is in no particular order. I'll u...
[Read more...]

Xasax closes shop

October 18, 2009 | Joshua Ulrich

Six months after shutting down opentick completely Xasax (opentick's parent company) has followed suit.It looks like Xasax hit funding problems in August... Inside Market Data mentions the above in this story. Here is the full story (subscription requ...
[Read more...]

David Varadi’s RSI(2) alternative

July 19, 2009 | Joshua Ulrich

Here's a quick R implementation of David Varadi's alternative to the RSI(2).  Michael Stokes over at the MarketSci blog has three great posts exploring this indicator: Varadi’s RSI(2) Alternative: The DV(2) RSI(2) vs. DV(2) Last Couple...
[Read more...]

RSI(2) Evaluation

June 28, 2009 | Joshua Ulrich

Despite my best efforts, it's been a month since the last post of this series. The first post replicated this simple RSI(2) strategy from the MarketSci Blog using R. The second post showed how to replicate the strategy that scales in/out of RSI(2). ... [Read more...]

Packages featured with Inference for R

May 12, 2009 | Joshua Ulrich

quantmod, TTR, and xts were (not so) recently featured on the Inference for R Blog. Inference for R is a Integrated Development Environment (IDE) designed specifically for R.The post gives an example of how to easily perform advanced financial stock a...
[Read more...]

R/Finance 2009 Presentations Online

May 4, 2009 | Joshua Ulrich

Posted to the R-SIG-Finance mailing list today:For those who missed it, the slides for the R/Finance 2009 tutorialsand presentations are now available on RinFinance.comhttp://www.RinFinance.com/presentationsWe want to thank everyone who traveled to Chi...
[Read more...]

RSI(2) with Position Sizing

May 1, 2009 | Joshua Ulrich

Though it's more than two weeks later, here's the second post in the series that will demonstrate how to build, test, and implement a trading strategy with R. You can find the first post here.The first post replicated this simple RSI(2) strategy from ...
[Read more...]

R/Finance 2009 Overview

April 28, 2009 | Joshua Ulrich

The first international R/Finance 2009 conference in Chicago, IL was a huge success! David Smith from REvolution Computing has written a great summary of the entire event. I'll take the lazy route and point you to his blog post. :)The first internati...
[Read more...]

opentick is no more

April 17, 2009 | Joshua Ulrich

After a year of "we plan to accept new subscribers shortly", opentick has shut its doors completely. As of March 20th, the opentick service is no longer available.From opentick.com:3/16/2009To opentick subscribers, friends, supporters, contributors an...
[Read more...]
1 2 3 4 5

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)