Calentador Junker, cambio de electroválvulas

Fin de semana divertido, hasta encontrar la solución, que fue el cambio de las 2 electroválvulas del calentador.

El problema

No daba código de error y la temperatura no subía de 15º. Después de limpiar el chiclé, de revisar el cabezal de la bombona y que el agua subía a presión bien miramos para las electroválvulas.


Cambiamos primero una válvula (la de abajo con pestaña verde), y probamos. Esto no funcionó, con lo que pusimos de nuevo la original.

Cambiamos la electro-válvula de arriba (con pestaña roja), y probamos. Esto tampoco funcionó, con lo que pusimos la otra de abajo de nuevo.

Con las 2 electroválvulas nuevas si funcionó.

Los videos en youtube son muy didácticos.

Simple Fibonacci Trading Strategy

I’m at the point where I can do backtesting with Python, and I need to accumulate knowledge about trading strategies, understand what they try to apply and be able to combine them on real cases I have.

This blog, Trading strategy guides, is a very good source of information well documented.

Fibonacci Trend Line Strategy- Simple Fibonacci Trading Strategy

Now I have to find the way to draw the fibonacci graph in python 🙂


Hello world in quantitative trading

Since I started on this field the focus has been to be able to build a set of

I found this training course with the slides posted, where Michael Halls-Moore explains the basis of the backtesting with Python and Pandas.

Things to remind

  • Taxonomy of trading strategies: forecasting, mean reversion, momentum and high frequency trading.
  • Review of the backtesting pitfalls: the same ones that mentioned by Ernie Chang.
  • Things to do after you perform the moving average crossover strategy:
    • Multi-symbol portfolio.
    • Risk management (the most important topic).
    • True event-driven backtesting, realistic handling of transaction costs, fees…

Moving Average Crossover Strategy

this is defined as the “Hello World” of quantitative trading. It’s included a specific article,

Exponentially weighted moving average (EWMA)

EWMA is a type of infinite impulse response filter that applies weighting factors which decrease exponentially. The weighting for each older datum decreases exponentially, never reaching zero.

Code written in Python 2

The proposed code is in python 2, but here you can find a guy that adapted it to python3. It uses Quandl library for obtaining financial data easily.



Learning when to “sell”

I learned some time ago that it is more difficult to define when to sell than when to buy.

Now during the learning process about trading I learned a couple of tips. Both of them are basic and valid for long term investment.

  • Check the average of 200 days and when the value of the stock suddenly grows provoking an increase in the distance with respect the 200 days average, then it can be a good moment to sell.
  • Analyse the fundamentals and check if the value is expensive.

For sure, both checks can be combined.

Intellectual property valuation

Management of Intellectual property (IP)

The intangible assets created through the processes of innovation represent a major share of the value of today’s businesses. The IP rights associated with those assets are the legal underpinning for potential returns on investment in that innovation. Despite their fundamental importance, the understanding of IP and IP rights does however
differ widely amongst businesses large and small.

Valuation methods

There are several valuation methods but the lack of standard type of valuations have negative impact in the efficiency to trade with IP; hence this has negative impact on the I+D researchs.

Lack of a standard set of methods for the valuations, but!

there are other standards provided by the World Intellectual Property Organization (WIPO).

WIPO is leading the definition of all aspects of IP, one of the areas of WIPO (there are others as patents, trade marks, industrial design…). There are so much advance on these topics and it’s an industry itself.

  • All relevant countries are associated with WIPO.
  • WIPO Standards on Industrial Property Information and Documentation.
  • WIPO Pearl: WIPO’s multilingual terminology portal gives access to scientific and technical terms derived from patent documents.
  • Global Design Database : enables free, simultaneous searches of more than 1,760,000 industrial designs registered under the WIPO-administered Hague System and/or in participating national collections.
  • ROMARIN – International Trademark Search. It allows you to search detailed information on all international marks registered under WIPO’s Madrid System.

I miss a section where they provide training and certification services. The standarization of the knowledge and the existence of a certification program enable companies to acquire the knowledge at their level. This would also give to the WIPO more visibility into the corporate business world.

(An example of a patent captured from Global Design Database)


Love Yourself Like Your Life Depends On It

Ravikant, Kamal has written this short book where there is not a extra adjective or word so you can concentrate in the goal of the book.

For my memories some of the topics described in the book:

  • Darkness is the absence of light, any negative though is darkness.
  • How do you remove it?, do you fight, fear or worry?Do you push or drown away sadness and pain?  Doesn’t work.
  • Look for the window, pull out a rag, and start cleaning. Just clean.
  • See the light of positive things that there is outside of the window.
  • Mental loop:
    • Repeat and repeat it, like a groove in rock created by water.
  • Meditation:
    • Music, 7 – 10 minutes, “I love myself”
    • Mirrow, 5 minutes.
  • Memory: reinforce the pathways.
  • Do the exercise about the thoughts that affects to you, differenciate if they are real or not real. Identify when something is real or when the mind is hijacked.
  • Surrender: “I used the fear as energy, driving me forward, pushing to achieve, pushing to succeed, paying no attention to my body, to the present, and I paid the price“. “Often, the price for not being present is pain“.
  • Real growth comes through intense, difficult, and challenging situations.