Last Tick Data for a Trading Day

1) I am getting last tick data for time period "2020-07-21T15:21:24Z" and no ticks after this on trading day. Checked this for both EQ/F&O instruments.

Is websocket API not publishing data post 15:21? Last 10 minutes are crucial many a times for volatile moves.

{ "_id" : ObjectId("5f16ba9c6315dccfe01f8e4d"), "timestamp" : ISODate("2020-07-21T15:21:24Z"), "last_price" : 1972.7, "oi_day_low" : 0, "volume" : 19007626, "sell_quantity" : 752259, "last_quantity" : 248, "change" : 2.750143236626905, "oi" : 0, "average_price" : 1962.18, "ohlc" : { "high" : 1977, "close" : 1919.9, "open" : 1939, "low" : 1936.5 }, "tradable" : true, "depth" : { "sell" : [ { "price" : 1973.65, "orders" : 3, "quantity" : 225 }, { "price" : 1973.7, "orders" : 1, "quantity" : 167 }, { "price" : 1973.85, "orders" : 7, "quantity" : 1642 }, { "price" : 1973.9, "orders" : 1, "quantity" : 40 }, { "price" : 1974, "orders" : 5, "quantity" : 2802 } ], "buy" : [ { "price" : 1972.8, "orders" : 1, "quantity" : 34 }, { "price" : 1972.75, "orders" : 1, "quantity" : 40 }, { "price" : 1972.5, "orders" : 1, "quantity" : 2 }, { "price" : 1972.45, "orders" : 2, "quantity" : 88 }, { "price" : 1972.15, "orders" : 1, "quantity" : 11 } ] }, "mode" : "full", "last_trade_time" : ISODate("2020-07-21T15:21:24Z"), "buy_quantity" : 500820, "oi_day_high" : 0, "instrument_token" : 738561 }


2) EOD tick or before 9:07 am tick for all instruments show timestamp: "1970-01-01T05:30:00Z". Is this a hard coded value? Can we write our logic assuming non-trading hour tick will always have this timestamp value?

{ "_id" : ObjectId("5f17989f4b7c654c87cbe96a"), "timestamp" : ISODate("1970-01-01T05:30:00Z"), "last_price" : 1971.55, "oi_day_low" : 0, "volume" : 0, "sell_quantity" : 0, "last_quantity" : 5, "change" : 0, "oi" : 0, "average_price" : 0, "ohlc" : { "high" : 1977, "close" : 1971.55, "open" : 1939, "low" : 1936.5 }, "tradable" : true, "depth" : { "sell" : [ { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 } ], "buy" : [ { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 }, { "price" : 0, "orders" : 0, "quantity" : 0 } ] }, "mode" : "full", "last_trade_time" : ISODate("2020-07-21T15:59:50Z"), "buy_quantity" : 0, "oi_day_high" : 0, "instrument_token" : 738561 }

Thanks.