This chart shows the Monero's supposed fair price, judging by the number of transactions it has each day on. Higher transaction count means the coin is being increasingly used, and since Metcalfe's Law proposes that more information being exchanged in a network means the network itself should be worth more, it also means the coin should increase in price. This was calculated as "how much Monero should be worth if it was a part of Bitcoin's network?" The answear is that Monero should be worth as much as its transactions represent as a percentage of Bitcoin's own transactions, but considering both coins' supplies. The formula is BTC-PriceUSD*XMR-Supply*XMR-Tx/(BTC-Tx*BTC-Supply);