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Hi thanks for your comment and those are the answers
Price prediction done by analyzing the previous prices of the currencies and the way they act in last 6 months of time.
Why I have selected those coins, that what I could say as experience ;)

Cheers~

Coin Marketplace

STEEM 0.16
TRX 0.16
JST 0.029
BTC 68392.22
ETH 2450.31
USDT 1.00
SBD 2.57