Close Price of the day's candle data is usually updated the next day, early morning. You can use historical data API to fetch historical day candle closes.

ohlc.close of the quote endpoint is the closing price of the instrument from the last trading day. For more details, please refer to the documentation.

1: You can refer to this discussion

I think the quantities may be zero in the holdings because they are all MTF, and the MTF section is not being put into the Holding POJO yet. Is this as expected for MTF ? I have bought one cash posit…

Maybe you can fetch circuit limit values from full quote APIs and compare it with LTP. You can refer complete response param here.

Please refer to the attribute details in the documentation. For VWAP, you need to use the "average_price" attribute.

Body and content-type should be application/x-www-form-urlencoded. Go through the documentation here.

can we get live No. of shares traded information of an instrument

The Tick object received from ticker market watch web socket api has OHLC value that refer to previous day OHLC

Are net_change and change are different value all together?

Go through the documentation here.

Go through the instruments file column detail here.

The net quantity will be there in quantity field.

You will need to user order_id. You can know more about different orderbook response params here.

No, bid-specific detail won't be available in the historical data APIs, but the total volume. All fields available for the historical chart data can be referred to in the documentation.

Make sure, you are sending Content-Type as application/x-www-form-urlencoded in the post request. Request structure documentation explains more.

Go through position response attributes details in the documentation here.

if order placement time is 10:00 AM

You can read about all the attributes here.

What is actually last traded time and exchange time in WebSocket?