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Investment Strategies / Mechanical Investing
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Author: rayvt   😊 😞
Number: of 5385 
Subject: Re: NDX 100 Momentum Strategy - Code Repository
Date: 03/06/26 10:08 AM
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Yeah I'm not looking to paper trade it for results, but rather to make sure I can produce the screen myself if it is not already being done.

Serious question, not intended to be snarky.

Why would you want to depend on anonymous people haphazardly posting lists of stocks for free?

It is not particularly difficult to get the data -- for free or for a small price -- and run the screen(s) yourself. If the screen is too hard to run yourself, then maybe it's just an overtuned mess.

One thing about doing this is that you KNOW what is going on with the screen and it's not just an invisible black box that you do not understand. Also, you can run the screen and make the trades at times of your own choosing.
Ex: On the last (or first or second) week of the month. Or on the last trading day of the month -- which statistically has a slight edge.

One issue that the MI screens have had is when a lot of people get the screen picks at the same time and immediately make trades all at the same time. Maybe not so much on shrewdm, but was a definite problem on The Motley Fool. One that stands out was the day Green Mountain Power first hit a screen. Trading volume spiked and so did the stock price. SEC called in the CEO and demanded him to explain, it looked like a front-running scam. (It kinda was. I made a few bucks by shorting it when I realized what had happened. The spike in the price happened in the next few minutes after the picks were posted.)


Frankly, Jim (mungofitch) has posted many screens over the years that are not difficult to run yourself. Most of them use only data that is easy to get and for free. I run three of them and all have had very good results.
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