Market dips below 81 nothing happens because the app is waiting for 78, but if the market reverses and goes above the low between 78-81 then the app enters a buy at x$ above the point between 78-81 and if no buy happens because the market reverses so rapidly then it app enters buys at levels the user has defined for x$ more, and x$ more until a buy happens or until a set ceiling is crossed.
So let's take an example for me to understand this. Let's say the price drops to 79, we have entered the buy zone (78 - 81), but it doesn't drop to 78. Instead, it goes up again. The user has defined buy steps at $2, and as soon as the price has reached $81, the bot would place bids at $83, $85, $87 etc. until a buy happens?