I don't trust charts, but...

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Lately, if you turn on the Bollinger Bands (upper, lower, and middle lines) for the Korean stock market, things move almost identically.
Whether you buy at the lower band and sell at the upper band, or buy at the middle line and sell at the upper band,
whenever it touches the upper band, it crashes without fail.
It's fascinating how stocks like Kolmar Korea and Robotis all behave similarly.