It would be better to retain the existing stock, Dip in price will of short term. Rather buy further when the price is less. We can trade once the price has reached up to certain levels.
I think we have to be very careful when the price is dipping because that is the right time to hold in the market because sometime those Dips will not carry much long time. After some time again the price will start jumping if you can start managing on holding then you will get more income on your spendings.