Order-to-trade ratio limits for algorithmic trading: higher OTR slabs allowed with deterrent penalties and temporary cooling-off. SEBI allows stock exchanges to introduce higher OTR penalty slabs with deterrent incremental penalties and requires a cooling-off measure whereby a member recording three instances of OTR at or above the higher threshold within a rolling thirty-day period is prohibited from placing orders for the first fifteen minutes of the next trading day; exchanges must amend their byelaws, rules or regulations as needed.