A low was formed and two previous days were counted backwards to enable green line to be drawn to the right hand side.
This is count back line analysis being used to identify a buy signal. A buy signal is a close of the daily candle above the green line.
At the moment SAN is on my watchlist. Awaiting confirmation of an uptrend forming. Higher lows printing daily candles is encouraging. SAN has recently been listed on Bitfinex exchange. I found this interesting as they have so few pairs listed for trading. Bitfinex have this week announced devlepoment of a new exchange for trading ETH and ERC20 compliant tokens. So I now expect the next announcement to be that this exchange with partner with SANTIMENT. That could see the charts pop! Stay tuned for part 2.
Not very convincing though as yet.