You will notice in this chart that all the red & green candles are in one line with their tails. hmm support us box. We will wait for a bullish candle, then after that we can see the opportunity to buy it.
At this time the price of IOCL is at good support. Now we can see the trend changing from here, or we can also see the buying side from here. otherwise nothing
Now the price of Trident is at 2nd last support. There is about 80 to 85% chance that the price will signal a slight bull from here. Only then can you think of buying it otherwise wait for the last support.