@haejin, that's exactly why making a reliable chart is extremely dificult: Market Manipulation.
Just take a look at the list of these coins. They all do show a very strange price movements with a lot of spikes.
I even have a list of coins I call "Popcorn Coins". These coins I had an investment in with an extremely high sell point already offering. After a while I did quet because it does cost a lot of work. But I managed three times to hit the jackpot by doing so.
AGRS
Ardor
Bytecoin
BitCrystals
Blocknet
BlackCoin
DGD
EMC2
LTC
Musi
Neos
Nuls
Lisk (sold at an extreme high price)
Salt
Siacoin
Qtum (sold at an extreme high price)
ZRX
If you are receiving this message, you have been flagged for responding to a known scammy piece of shit. Enjoy your dwindling rep. Here is how @haejin supports the community.
P.S. - His 21k followers are complete bullshit and most are inactive and have been for months.