A straddle chart plots the at-the-money straddle premium through the session: the ATM call plus the ATM put, drawn as one line. Because the two legs face opposite directions, direction cancels out and what is left is the price of expected movement. It is the cleanest single reading of what the option market thinks is coming before expiry.
The series rolls with the underlying. As spot moves and a new strike becomes at-the-money, the line follows it, so it stays a measure of volatility rather than of one strike drifting away from the money. Without that roll a large index move would show up as a jump in premium that never actually happened.
A premium falling steadily through a quiet session is theta and implied volatility leaving the options together. That is the ordinary shape of a calm day, and the condition option sellers are positioned for.
A premium rising while the underlying stands still is the opposite case and the more informative one. Nothing has moved, so the increase is the market paying up for risk it now expects, usually a scheduled event, a policy decision or results. A short straddle loses money in that state without a single adverse tick in the index.
Sharp decay concentrated near the close on expiry day is the last of the time value going out. Predictable in direction but not in size, because a late move in the underlying can overwhelm the decay entirely.
The VWAP line gives the volume-weighted average premium so far, a reference for whether the current price is rich or cheap against where the session has actually traded rather than against where it opened. The synthetic future, derived from call-put parity at the money, exposes the basis between the options and the underlying: a gap that widens under stress and one the spot index alone will not show you.
The premium doubles as the market-implied range to expiry. Read it as a rough one-standard-deviation band rather than a limit. A 200 point NIFTY weekly straddle is the market pricing something close to a 200 point range by expiry. It reprices continuously and is wrong often enough to be treated as a gauge, not a boundary.
The chart is free and needs no account. These are analytics, not advice.
A straddle chart plots the combined premium of the at-the-money call and the at-the-money put over time. Direction cancels out between the two legs, so the line tracks what the market charges for expected movement rather than for a view. One number, updated tick by tick, for the price of volatility on that underlying.
Because both legs are losing time value and neither is gaining from a move. Theta drains the call and the put together, and on a quiet session implied volatility usually drifts down as well, which compounds it. That combination is what option sellers are positioned for, and it is the commonest shape a straddle line takes.
The market is repricing risk rather than responding to a move. It normally happens ahead of a scheduled event, a policy decision or results, when participants bid implied volatility up in advance. This is the one pattern that damages a short straddle with no adverse move in the underlying at all, so it is worth watching.
Take the straddle premium as a rough one-standard-deviation range to expiry. If the NIFTY weekly straddle trades near 200 points, the market is pricing roughly a plus or minus 200 point range by expiry, a little under that in practice. It is an approximation, not a boundary, and it widens or tightens as volatility reprices.
Yes. The chart is free, needs no account and no login, and updates live through the trading session. It reads the same NSE option-chain feed as the rest of the terminal. It is analytics only, which means nothing shown here is a recommendation to buy or sell, and no entry or position size is implied by anything on it.
Analytics only. Not investment advice. Last updated .