Its not a lie when its being said "Whatever goes up must come down". Imagine what would happen if the market is always going up and never falls, there is no doubt that the market will soon or later crush. That is why in financial market there are regulators who makes sure the price always corrects it self so that some currency are not devalued.
Polkadot
It has found resistance at $27 and support level at $18.5 and it is currently down with 7.21% on the capitalization.There are chances that it will break the current support level and retest then it hit $18.8. It may also fail and break below $18.819 and might fall and test $12 then from there we will start finding buy opportunities.

Chainlink
Chainlink is now trading at $21.58 which is down with 5.62% on 24hour and capitalization is down with 5.48%. The price it trending in a downward channel and it now currently forming a bullish streak on the H4 chart.
If it manages to reach $23.661 and breaks out of the upper-band of the downward channel and resistance then retest and if the resistance hold to become the support level then we expect another bullish streak up until $32. There are also chances that it might fail and break below the lower band of the downward channel and it will find support at around $18-19.

Conclusion
From the 24 hour previous tradings the total market capitalization has lost only -3.92% which is a small margin. Its like the whole market has hit a brick-wall and is sitting on the support level as most altcoins are ranging on the same area.