There are many people invest in ICOs and then sell in the short term to make a profit. This makes it very difficult for the holders. The exciting thing about ICOs is that they research and trust the ICO project and then invest and hold to make a profit in the long term rather than buying and selling in the short time.If you're referring to fast movements in closing your position, then yes, it is doable through the help of trading bots that automatically closes your positions once you reached a certain threshold. It is also kinda safe to let a bot do the trading for you especially if your mechanical skills and attention is kinda slow.