https://simplepospool.com/?ref=conwayr17

Coin Supply (PRJ)
1909297.81812587
Masternodes
Total : 251
Level 1 : 111
Level 2 : 83
Level 3 : 57

Rewards increase to 50 coins per block at block 100,000 ... expect a huge rally people want max rewards, these rewards exist until block 180,000 which is like 4 months.
You cannot chart MN coins. You just have to follow the block explorer and ensure nodes are always increasing. Nodes lock coins.

So 251 nodes X 6,000 coins per node puts available trading coins at  1909297  (current supply ) - coins locked in nodes 1566000 = 343K float available for trading.

This is why such high volume. Peeple fight for the coins for MN's