You do a fundamental analysis to identify which stocks are worthy to be invested in based on your valuation criteria.
You do a technical analysis to identify the best entry and exit points on the stocks that passed your fundamental analysis.
Both types of analysis consume time. There are over 300 companies listed on the Philippine Stock Exchange. Even if you know how to analyze stocks, do you think you can finish analyzing all stocks in one week?
By the time you have finished analyzing all stocks after a number of weeks, your analysis may no longer stand true since new prices have already been registered while you were busy analyzing.