As promised in the [introductory](https://beta.steemit.com/hive-175254/@aiplusfinance/stock-market-trading-with-ml-and-ai-series-introduction) article, this article continues our learning journey on how to trade the markets using ML/AI. Consider these series of articles as a learning journey which means that unless you are an advanced student of computational or algorithmic trading, you should try not to skip any article in the series. To help those new to my blog (and maybe seeing the most recent article first), I'll try to reference previous articles as much as I can. So let's dig in. Today, we'll concentrate on a major tool we'll be using to learn how to trade the markets. Suffice to say that he most important tool with any trading algorithm will be the programming language of choice. In choosing a programming language to trade the markets efficiently, there are certain criteria that will need to be met and include: #### Easy to learn and use There is no use spending a lot of brain power learning a complicated language when there is so much already to learn in the fields of ML/AI and finance. Doing so in my mind will be wasteful, hence the need to pick the simplest program that can get the job done. For such a program to be simple and easy to learn, then it must translate well from the English language (my apologies to non-English speaking people, but you get my point) to the programming language with minimal need for the now outdated *pseudo code*. ![wizard-1459117_1280.png](https://cdn.steemitimages.com/DQmUjSDV9YEXTjrHLPigWNsbTUbodaCswNcwddJqbRUSrzH/wizard-1459117_1280.png) Image by GraphicMama-team from Pixabay #### Supports not re-inventing the wheel I don't know about you, but I'm a lazy programmer. If I have a problem, the first thing I do is to search the web to find if someone else has implemented the solution I had in mind. More often than not, this will usually be the case. However, this doesn't happen at the same degree for every programming language. It generally happens for *popular languages that have a rich ecosystem of developers and users*. ![caveman-159359_1280.png](https://cdn.steemitimages.com/DQmaV9c4yqZCF6y2yZitP4TuwD268ktUHMthR6hr1YK2pAC/caveman-159359_1280.png) Image by OpenClipart-Vectors from Pixabay #### Rich ecosystem for finance and ML/AI codes There are several great programming languages with rich ecosystems for ML/AI codes. However, there are few of them that play well with finance also. The reason for this is that, historically, finance has mainly been a human profession until most recently with the birth of disciplines such as computational investing or econometrics. Most finance professionals are not programmers. This added to the fact that ML/AI is also a relatively new discipline, makes older programming languages almost out of the question for our purposes. For example, you will hardy find a finance code written in FORTRAN except it is highly propriety. Most finance codes will be written in the newer languages. ![clean-1223168_1280.png](https://cdn.steemitimages.com/DQmZv3Y2jh7RAVMRpdjfxVM1vssjcfiHjSo3pa6w3RDxdJw/clean-1223168_1280.png) Image by M. Maggs from Pixabay #### Supports various programming styles Many of us come from different backgrounds when it comes to coding. Some code in object orientation style while others code procedural. Whichever the case, you want a programming language that can not only support your style but support other styles a problem might be solved easier in. ![css-27192_1280.png](https://cdn.steemitimages.com/DQmdncKBt2Vhe1b6SZSNJCdp61ZxKpoRduvb6urpRFoCFsK/css-27192_1280.png) Image by Clker-Free-Vector-Images from Pixabay #### It should be FREE! This cannot be overstated. In my opinion, paying for a programming language is not necessary in today's world unless you need a lot of support (and not willing to learn the fine art and science of programming). There are far more unavoidable costs you need to deal with in trading such as transaction costs, slippage costs, data costs, liquidity costs etc. (we'll be touching on all this in our learning journey) that self inflicting programming language costs seems counter productive. ![coupon-1828620_1280.png](https://cdn.steemitimages.com/DQmdTDpAfp97zM2XHfb7LuNW11Lqyi4QFBcuUVpTUL7jxfL/coupon-1828620_1280.png) Image by Lu Lettering from Pixabay There only programming language that satisfies all five (5) criteria above is the **PYTHON** programming language and will be the major tool of our trade. Now some might argue for languages such as R (fails criteria 3) or MATLAB (fails criteria 5) and while they are close enough, they do fail at least one of the above criteria. However, this is a learning blog and I'll be glad to hear opposing views on this (the comments section here is your friend). ![snake-37585_1280.png](https://cdn.steemitimages.com/DQmV4szk5jc8fbhWRf5s1imWpfLfYmXJEp8jmnbSznEonZQ/snake-37585_1280.png) Image by Clker-Free-Vector-Images from Pixabay So that's it for this week. We'll stop here so as not to make the article very long (I hate those and guessing you are also like me). However, we've made significant progress and have arrived at the **most important tool of the trade** - the Python programming language. Next week, in **part II** of this article, we'll be looking at the *sub-tools* we'll need with python to create an effective trading platform. Before we go, since things are becoming real, I think it's time to include a disclaimer for this series of articles: **DISCLAIMER** *Trading is very risky and you should only risk funds you are willing to loose in trading either humanly or via ML/AI. This blog content does not constitute investment advise nor is it a substitute for expert opinion. When in doubt, please consult your financial adviser* Yours in learning, ![AIPLUSFINANCE.png](https://cdn.steemitimages.com/DQmWNWYMHMrzLFjCMw977LtbaDxvbJSrb1UBx2XPdQf15n5/AIPLUSFINANCE.png)