GOOG shares have retreated from their 5-month high ($581) but there is good trendline and Fibo support at current levels, which could help for a nice rebound. If the correction goes further, there is significant support @ $540 (Jan high), $530 and $520 (Feb local lows and Fibo support).
GOOG daily chart (6 months):
Chart courtesy of http://www.StockCharts.com
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Petros Steriotis, CFTe, MSTA 