大盘突破年线(250-day simple moving average)之后继续上行，受阻于100周均线4205(500-day simple moving average)已达六个交易日，现回抽ing年线4024测试突破之是否有效。.

预计大盘短期仍将在二者(4024 to 4205)之间来回折腾，直到突破二者之一，以定方向。

SPX500 is being blocked by 100-week simple moving avearge (i.e. 500-day simple moving average) after breaking out of the important year-line (250-day simple moving average).  It is retracing towards the year-line at this moment to test if the breakout was valid.

Expect SPX500 to move back and forth between these two lines (SMA250 and SMA500) in short term until one of them is broken out in order to determine the main direction.