by the way you should never look at bitcoin price versus Tether. always look at it in USD or any other real fiat currencies (EUR, JPY, CNY,...). your chart is using Tether which is a shady and high risk altcoin.
As long as arbitrage keeps the markets in line it doesn't affect the charts. USDT has been trading at $0.99-1.01 for a very, very long time. Given that, what specifically is the problem with charting USDT pairs?
If the "high risk shadiness" of Tether hits and USDT holders get screwed, can't cash out, etc. it will be reflected in market prices, just like it was on Mt. Gox in 2014 or Wex.nz in 2018. Cross that bridge when we get to it, not sooner.
Hence why all the traders now are waiting for the futures to open so they can determine the next direction.
20 minutes until the weekly open! I'm very curious to see where futures open after Friday's nasty close.