what is the expected value for stoch.eurusd if there are periods with no ticks.
It will always return the same value, even if there is no tick for 2 days (just like looking at the M1 chart during the weekend, it just won't move, stoch value will stay the same, the last value of Friday 23:59). Then in the next tick a new bar starts and also the stoch value will change and also every other iSomeThing() indicator will have moved exactly one bar: shift 0 will now again be the current minute (now monday 00:00) and the "minute before" (shift 1) will be the last minute of Friday (the one you have seen at shift 0 during the whole weekend).
what is the expected value for stoch.eurusd if there are periods with no ticks.
"what is the expected value for stoch.eurusd if there are periods with no ticks. "
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there are no periods (on the chart ) with no ticks. Every bar there has a tick, though some bars can be "missing" if there were
no ticks during the entire interval -- like no ticks from 1:04 to 1:11 -- the 1:05 5m bar will be missing.
The future has no ticks, but we aren't there yet.