Yes global markets affect the intraday price movement.
Market movement is based on two factors, fundamental and sentiment. Based on Fundamentals like profit generated, future growth etc, the share prices move up or down over a long term. Short term price movements are based on sentiments, announcements, global factors and surprise news. If there is a sudden and important news on US or Chinese, it will affect the whole world and all stocks tend to go up or down despite fundamental factors being contrary to a particular stock.