The external analysis details frameworks for assessing environmental trends, industry competition, and opportunities facing Atlassian, highlighting PESTEL factors like currency fluctuations and technological advancements such as cloud computing. Using Porter's Five Forces, the analysis finds medium threat from new entrants, high supplier power, and high competition, while Atlassian is positioned well among various customer segments, particularly in team software solutions. Additionally, the document discusses industry growth potential and identifies opportunities for disruptive innovation and vertical integration in a competitive landscape.