what if it goes down?

What to do if you buy a stock, based on the methods outlined here for buying low, and it goes down?

I'm hoping you feel some confidence in the stock. I'll write more about that. How does the chart feel to you? If you like the stock, when it goes down by 50%, you can buy another batch of shares, with even less risk.

Your other option is just to hold on. I don't think there's much point in selling. You'll just loose your money. Stocks you buy will go down, sometimes. They'll go down by 50%, even 75% or more, sometimes. (If you like them at 50%, buy them again at 75%. There's a system to this. If you buy the same number of shares at each price, you can basically keep adding shares and never invest more than double your initial investment. You have to account for commissions, though.)

You should, after all, not be buying a lot of any stock. The best way to start with this system is probably to find a few stocks that actually are trading at historic lows, or otherwise really attractive prices, and buy $100 worth of each. Then, watch them, and wait for sales. You're only going to sell them if they double, so, if the system is a bust, well, you're out that money. But, hopefully, you'll get a double quite soon. Then you can start investing again. Replace the one you sold with one or two others.

Some considerations, here:

If you are only investing $100 in a stock, and it's trading above $1, you will be buying odd lots, and you won't be able to place all or nothing good until cancelled orders. That's probably not important if the stock is actively traded - you can just use a non-all or nothing order - always a limit order. If the stock is not actively traded, I wouldn't recommend that. You will just have to use day only orders. Always limit orders. What is an actively traded stock? Your order should be just a drop in the bucket compared to a typical day's volume.

If you plan to sell for a double, $100 is sort of the least you'll want to invest. Factoring in commissions, your profit is likely to be $80, after commissions. If you want to make real money with even smaller investments, you need stocks that will go up not by 100% but by, say, 300%. It's probably not unreasonable to think you can find such stocks, using the methods described (the gut method and the low price method). I'm just saying.