One leading indicator could be helpful to know when the bottom for stock market is reached which is corona virus US daily increase numbers.
Published by John Hopkins University for COVID-19 Web site, global increases on infected numbers are important to watch as leading indicator.
As we can see from featured picture, this number keeps going up for new high in US. United Kingdom behaved the same. It means that outbreak of corona virus is getting worse not top-out.
Therefore, good news like oil reduction after Trump discussion with Putin and Saudi-Arabia today is unlikely to change its downward direction for stock markets.