The effective pairs of time windows for five representative indices.

<p>The probability difference (<b>a</b>) Δ<i>P</i>(<i>t</i>) and (<b>b</b>) Δ<i>P</i>₁(<i>t</i>) for five stock market indices. Different colors represent the regions of effective pairs of <i>T</i>₁ and <i>T</i>₂ for different indices. Specifically, navy stands for the Brazil Index, orange stands for the Shanghai Index, red stands for the Mexico Index, yellow stands for the Spanish Index and crimson stands for the S&P 500 Index. For clarity, we display only one color at the overlapping regions, given that these regions are small. Some scattered points are also omitted.