Using ema 21 and 100 for buying btc in best price

as you see on the chart best place for buying btc,occured when ema 21 cross below the ema 100.it happened two times in the past..now we can see these emas are close to each other and a death cross will happen in next 4 weeks in my opinion. btc will dump and its a good opportunity for buying.
Moving Averages

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