Pinch points are where a creek or waterway narrows down. Alot of pinch points are found in small creeks that otters travel... also a hint where to set... any old or active beaver pond set above and below pond in water ways in narrow areas. Alot of times you wont find any otter sign in the creeks BUT the otter travel them. Also if there is a shorter way to reach water way; otter will go over land to reach a spot they are heading too. Alot of times when it snows and otter are traveling you can find these spots or trails. Bottom edge sets are also very good. Get your self a book on bottom edge sets and read it over. Ken Smythe has book out on that subject. You have to get your sets out BEFORE the otter comes thru and WAIT, sometimes it is a patience game and making sure your sets are in working order. If you find bvr ponds, you WILL have otter. Good luck.