I understand your view but y'all have been so fixated on duration neglecting the fact that mindset among others differentiates trading from investment.
As long as you planning on riding the wave and relying on technical analysis for profit, you trading.
Investments is more like accumulating wealth and more reliant on fundamental analysis.
Now to short term investment and trading?
Trading may look like short term investment but they are not the same.
Though trading traditionally is considered less than a year
There are times it span for years.
So duration varies based on Mindset but normally investments are 4 years+
If you accumulating wealth for long term that's investment
But if you actively interested in tops and bottom for maximum profit
You trading.
You hold 3 years and sell to buy cheaper and another holds 7 months and sell to buy cheaper are both trading
The difference is the duration.





Duration isn't absolute and could be considered subjective for short term investment.