Trading Tools: Abacus

Methods that help with fast decisions while trading many stocks.
& reasons to use them aside from just the platform itself
like: confidence, instillment, shorter term to longer term memory.

& Yes, a method of actual trading could be devised from it,
but today this is only about using the abacus instead of paper and pen, for exits.

3 versions for your Pre-market set-up:
Magnets & Metal board (cover in a plastic quilt square for lines.)
Abacus (usually only 18 stocks possible.)
or simply writing down a list at pre-market for exits or entries.