# Bullish Options
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Bullish options are used by traders when they expect to see a rise in the asset price.
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Options AI offers four different types of bullish options:
* Call
* Strap (Classic Strategy)
* Bull Call Spread (Classic Strategy)
* Bull Put Spread (Inversion Strategy)
## **Call Options**
**Definition:** A call option is an on-chain contract that gives the buyer the right, but not the obligation, to buy ETH or BTC at a fixed price during a certain period.
### **How Call Options Work:**
* The buyer chooses the size, period, and strike price for the option contract.
* **Size:** Number of option contracts being acquired.
* **Period:** Number of days the contract will be active.
* **Strike Price:** Pre-determined price at which the buyer can purchase the asset.
* The premium is calculated based on the chosen parameters, and the buyer pays this amount in USDC.e using their wallet.
* Upon payment, the buyer receives an ERC721 option token representing the purchased option.
* The buyer can exercise the call option during the selected period using the ERC721 token.
* **Outcome:** If the price of the asset rises above the strike price, the buyer profits. If it does not, the option expires worthless, and the seller keeps the premium.
**Exercise Process:**
* The buyer sends the ERC721 token to the protocol to exercise the option and receives the profit in USDC.e.
* The contract must be exercised before the expiration time, provided the price is above the strike price.
**Available Periods and Strike Prices:**
* **Periods:** Ranging from 7 to 90 days.
* **Strike Prices:** ATM (current market price) and three OTM prices:
* Market Price + 10%
* Market Price + 20%
* Market Price + 30%
**Example:**
* Market price of ETH: $2,337.
* OTM Strike #1: $2,571
* OTM Strike #2: $2,804
* OTM Strike #3: $3,038
## **Advanced Strategies**
### **Strap Strategy**
* **Structure:** Two call options and one put option with the same strike price and expiration.
* **Profit Potential:** High profits if the price rises sharply, reasonable profits if the price falls.
* **Use Case:** Betting on rising volatility with a bullish bias.
### **Bull Call Spread**
* **Structure:** Buying an ATM call option and selling an OTM call option with a higher strike price.
* **Profit Potential:** Decent profits if the price rises to a certain level with lower cost than an ATM call.
* **Use Case:** Betting on a moderate price rise.
### **Bull Put Spread**
* **Structure:** Selling an ATM put option and buying an OTM put option with a lower strike price.
* **Profit Potential:** Profits if the price stays the same or rises, with immediate profit potential after purchase.
* **Use Case:** Betting on a stable or rising price without waiting for a rise.
