Should I Buy Stocks With My Spare Cash Now?

Nowadays the market seems to always close low, seems like a good chance to buy, I am especially looking at Semb Corp Industries, since I bought 1 lot at S$5.15 earlier, it's been devaluing and today it close at S$4.80, seems like a good chance to average down. I think I can spare S$5000, maybe I should start queuing tomorrow, maybe aim at S$4.70.