Abstract: A user-replaceable e-liquid reservoir for dispensing e-liquid, the reservoir being inserted into, or otherwise attached to, a portable, personal e-cigarette device and engaging with an electrical or electronic pump fluid transfer system in the device, the device including: an electrical or electronic pump, being configured to transfer e-liquid from the e-liquid reservoir to an atomizing unit in the device, the pump delivering a pre-defined or variable quantity of e-liquid from the reservoir; and in which the reservoir is not user-refillable.

Abstract: A pricing engine that automatically forecasts a price of a tradable commodity so that a quote price can be generated that will remain valid for a pre-defined time window. The pre-defined time window is typically a short time interval which is long enough for the user to evaluate the price and trade on it if required. In one implementation, the pricing engine forecasts what the price is likely to be at the end of the pre-defined time window and that forecasted price is then used as the basis for the quote price.