Created by self-described “geeks” Michael and Carl, Marl is a stock-trading robot programmed to analyze the market and determine when stocks are primed to double. Multiple online testimonials suggest that Marl’s advice has been largely helpful, although their disclaimer also points out that you’re likely to lose money at some points as well. If you are willing to invest $47 into Doubling Stocks newsletter, you have an 8-week period during which you can request a refund, and you are still able to receive the newsletter for another 6 months because they believe that you will change your mind and request to be re-instated in the program.

There are certainly downsides to e-mail newsletters like Doubling Stocks, one of which seems to be the limited number of participant spots available (just 14 left at time of review). In addition, it appears that a third party is marketing Doubling Stocks, although their website does suggest that the author is Michael. Finally, the most profitable way to use Marl would certainly be to purchase it for your own computer, but with a licensing fee of $28,000, it’s evident that most start-up traders are unable to match this fee. However, the website points out that most traders who have made their fortunes with Doubling Stocks eventually invest in their own version of Marl as well.

For someone who has little knowledge of the stock market, Doubling Stocks is not likely to be the answer to your dreams of raking in the dough. However, for someone who has knowledge of the market and is struggling to make ends meet, Doubling Stocks is a predictive newsletter that relies on the predictive power of what their website claims is the “first” automated stock robot. With their 8-week money-back guarantee, the only risk involved with trying Doubling Stocks is the normal risk you’ll find trading penny stocks.