Add Contract Expiration Bars to Chart

Apply options or futures expiration vertical bars to current chart.

Usage

addExpiry(type = "options", lty = "dotted")

Arguments

type

options or futures expiration

lty

type of lines to draw

Details

See options.expiry and futures.expiry in quantmod for details and limitations.

Value

Expiration lines will be drawn at appropriate dates. A chibTA object will be returned silently.

Author

Jeffrey A. Ryan

See also

addTA

Examples

if (FALSE) { # \dontrun{
addExpiry()
} # }