Zerodha straddle margin

Zerodha short straddle margin keeps on changing. I have sold 16200 CE & 15600 PE.

In whole day it keeps on changing & by end of last one hour due to volatility, My available margin became negative by few hundreds & I had to add funds.

So here i have two questions.

  • Upto what extent margin requirement can change. How much buffer money should I leave 5% or 10% or it can even go higher, BTW both are still OTM options.

  • What if my available margin is in negative around close of day, not by very large amount may be just 1-2% of my entire capital used, what will happen? At what point zerodha RMS team kicks in & square off positions?

@siva Can you help please.