I think you should always know in the back of your head that some will reach your target and some wont. Maybe you should try adding a partial out system in your strategy. That way you take profits half way and full way, or just half way.
Start figuring out what kind of style you want to trade. Do you want to scalp, Swing trade, Gap Trade, Momentum Based. I am not saying you can't do all. But you should find what helps you perceive the market correctly most efficiently.
I believe News and Technicals can both be used secretly or together to make real good trades It all depends on how you make your perception of the market.
Not much you can do with a $100.00 account.
It really depends on how you utilize the demo. If you are using it as a game and not creating Rules and Guidelines to create a strategy then the demo can be deemed useless and even more so harmful due to the ability of creating bad habits on a fake...
It will be hard to find TWTR Shorts as its a new IPO. Most of the time they implement this restriction so the stock cannot be influenced to go down unnaturally.