Unlike most other brokers, there is no initial margin, which is required when you open up an account with Upstox.
You can choose to transfer any amount of funds in your account. The amount that you transfer will be used for margin for trading purposes only.
However it is advisable that you keep adequate funds in your account for trading. This will enable you to trade on the go and ensure that you don't miss out on even the slightest of the market opportunity.