lack of stop loss first mistake, take a look at the chart, learn to read charts if the RSI is approaching 30 consider buying more and averaging back up. Watch volumes if the company has good profits and good growth then stick with it ( tho u may have to hold a while)
all i can suggest is ask some technical questions, learn charting and stop loss always or if it keeps falling take out a short position if u can using cfd and offset some of hte losses
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