I don't think Twitter can actually affect the price of bitcoin, for sure many people get some info but those who can really change the market don't care about Twitter, they do whatever they want.
It doesn't affect directly on the market. indeed some people do follow signals or tips from users on Twitter but that doesn't mean Twitter has a big influence on market prices. seeing that not many people follow the signals and tips on Twitter. there are still many other bigger aspects that effect than twitter