multiplier means lot size of that particular contract. Go through the positions response attribute doc here.

The OHLC API gives open, high, low and close price of the day. You can know more here.

StatusCodeError: 400 - "{\"status\":\"error\",\"message\":\"Invalid order params.\",\"data\":null,\"error_type\":\"InputException…

It is up-till that very quote update i.e latest quote data. You can find details of all response attributes in the doc.

Make sure, you are requesting the header content-type as application/x-www-form-urlencoded.

https://kite.trade/docs/connect/v3/orders/#response-attributes

https://kite.trade/docs/connect/v3/portfolio/#response-attributes_1

In kite.trades(), we get a trade_id for each trade. How is it generated?

Are you using WebSocket streaming or Quote call?

https://kite.trade/docs/connect/v3/portfolio/#response-attributes_1

https://kite.trade/docs/connect/v3/user/#response-attributes

https://kite.trade/docs/connect/v3/portfolio/#response-attributes

https://kite.trade/docs/connect/v3/portfolio/#response-attributes

It's showing as net margin right? As, you have done the intraday payin, it will show under intraday_payin field as well. Go through the documentation here.

You don't need a refresh token, it's is only available to certain approved platforms. Go through the profile response attribute detail here.

how can we relate ltp value to ohlc ?

when I issue kiteconnect.getOHLC, its returns Close Price of previous day (as of 12-Oct-2021)

previous days

GetOHLC is a quote call not candle historical data fetch. You can go through documentation here to know more.

how to get last executed total sell quantity and total buy quantity at the exchange?