We have here a simple horizontal stack setup, comprised of 3 handling players and 4 cutting players. The purpose for this kind of an offensive structure is to create spaces for cutting in the near field (closer to the handler line) and deep field, while also using the width of the field to attack as well. Unlike a vertical stack, the horizontal stack does not require the offense to function primarily on one side of the field, and cutters can attack from and move to any space on the field.
The cutters are stacked across the width of the field, between 15 and 20 yards away. This distance provides ample space for in-cuts, while still maintaining the greater space in the back for good deep cuts. Additionally, the handlers should be spaced far enough away to avoid clogging the upfield lane, but close enough to make an efficient reset/dump cut.
The basic motion of the Horizontal offense is in and out of the space at an angle. The motion should NOT be straight up and down field. We attack primarily from the center of the field because these cuts are shorter and quicker than those coming from the corners, and do not require cutting straight towards the disc.
In this stack, multiple cutters can make different and potentially open attacking movements without interfering with the other's movements.
Once complete, the cutters can clear out the sideline simultaneously and activate new cutters, who will replace them in the center of the field.
When the disc is moved to the sideline. We can repeat the process using the two cutters on that side.
However, these cutters get only one opportunity to get open before we activate the reset and try to re-center the disc.
for the horizontal stack, we want to keep the disc in the possession of the handlers as much as possible, because we want to have all four cutters available upfield at all times. Therefore, when a cutter receives a pass (especially the in-cut), the handlers should immediately move to the cutter to regain the disc. Let's demonstrate this:
The cutters make their moves away and then to their cutting space...
Once releasing the disc, either the center handler or the handler on the same side of the receiver should move upfield to regain possession.
Now the handler can either continue their motion upfield and pass to the out-cut, or they can holster the disc and reset the stack.
This is the basic motion of a horizontal stack. Remember that both sidelines handlers can be used as resets for the disc, and should always be ready to receive the disc from a cutter or handler regardless of the force. Handlers can swing the disc back and forth across the field as much as necessary, just as in a zone offense, or may alternate into a cutter at any moment. The horizontal stack provides a very fluid structure, which allows for a lot of improvisation for experienced players.
If you are a part of a more experience team with more experienced and skilled cutters, I would recommend pushing the cutting stack further from the handlers. This would provide greater space for the cutters to improvise and work, while utilizing the (presumably) better throwing skills of the handlers.