Here trader plays against any intraday levels that might present themselves in an instrument of large volumes (AAPL, SMCI etc).
Find significant intraday local levels, or global levels if lucky. They should present themselves through a test that matches something previously in the day - like Open or some tail.
Sometimes, when a rejection is very clear, it can be both a Test and a level establishing event - see AMD below.
Wait for price to start traveling toward that level again (after 1st test), and have a bracket set up to enter. If it looks like its bouncing... ENTER.
This strategy will scale to 10k+ Rs.
Some examples:
