The graph below shows the 1458 daily simple moving average (1458d SMA). A simple moving average takes the average of all the prices in a list.
As an example, let's take the 3 day moving average for the following prices: 250, 320, 280. The daily moving average would be: (250 + 320 + 280) / 3 = 283.33
Similarly, the 1458d SMA will take the daily closing prices of the last 1458 days and return the average.
The 1458d SMA has historically proven to be a good support for the Bitcoin price long-term (over a 4-year bear/bull cycle). Every time the Bitcoin price was close to the 1458d SMA, it has been most profitable to buy. As an example, look at the following dates and analyse what the price has done. You can click the below links: