So say a stock is 125 dollars today but I want to buy it when it drops to 110 automatically..
That is not an OPTION??
What is that called when you set your app to do that..
Unfortunately it's quite easy to lose money quickly selling options. You can buy the options you sell back to minimize how much you lose but it sucks.
Options trade in lots of 100. If you sell a put option on a $125 stock you're basically putting up $12,500. If the option expires quickly, like the next Friday, you won't get much of anything unless the stock is in a free fall. Even then it's not likely the put will be worth much.
But say you sell a put option on that $125 stock at $110 that expires a month out. There are an infinite number of factors that determine what you will get for selling the put but let's assume for simplicities sake you get $500. It's easy to think "that's a pretty good annual return on a potential $11,000 investment". Cha ching - $500 immediately deposited your account.
Fast forward two weeks - the stock takes a dump and now sits at $115. The value of that option that is two weeks from expiration is now up to $1000. You're stuck - Do you take a $500 loss and get out or hold on and hope? You hold on and hope.
A week later that stock tanks again down to $105. That same option is now worth $2000. What now? You're out $1500 if you buy it back at that point.
Trading options essentially means fighting against the quant departments of all of the major firms (and inside information) . It's not for the faint of heart but you can make decent money if you're careful.
A while back I sold 5 $110 puts on NVDA that expire 4/17 iirc. They netted me around $3700. I'm putting up $55,000 to make $3700 fairly safely (I hope) over about 6 or 7 months. I don't believe NVDA is going anywhere anytime soon.
But always remember Stamps.com. That stock was coincidently also sitting at around $125 years ago. I believe they lost their contract with the US postal service and that stock tanked ONE HUNDRED dollars a share aftermarket.
Since options only trade when the market is open anyone who sold put options on that stock lost their f#@king shirt. Conversely - people who owned that stock and bought puts as insurance saved their asses.