Entry price
The price recorded at the moment your trade opens; the price at expiry is compared with it to decide whether the trade wins.
The entry price (sometimes called the strike or opening price) is the reference point of a Higher/Lower trade. A Higher trade wins if the price at expiry is above it, a Lower trade wins if it is below, and an exactly equal price is a tie with the stake refunded.
Beginners sometimes assume the entry price is whatever they saw on screen when they clicked. In fast markets the price can move between the moment you decide and the moment the order is processed, so the recorded entry may differ slightly. That is one more reason not to build trades on a single-tick move.
Where you enter relative to the structure of the chart matters more than the exact digits. Entering Higher right under a strong resistance level, for instance, means the price has to push through that level for you to win.
On Sky Trade trades are opened and closed by the server at the server's price and time, and every device shows the same chart, so the entry price shown in your trade is the one that counts. See how Higher/Lower trades work.
You press Sell on GBP/USD and the trade records an entry of 1.26510. At expiry the price is 1.26498 — 1.2 pips lower — so the Lower trade wins.