# Table of Contents
* [Action Statements](#action-statements)
    * [CREATE EXCHANGE](#create-exchange-statement)
    * [CREATE SPREAD](#create-spread-statement)
    * [UPDATE TRIGGER](#update-trigger-statement)
    * [LIST TRIGGERS](#nop)
    * [SELL](#sell-statement)
    * [BUY](#buy-statement)
* [Functions](#functions)
    * [PURCHASING_POWER](#purchasing_power)
    * [CURRENT_PRICE](#current_price)
* [Types of Exchange](#types-of-exchange)
    * [IB_API](#ib_api)
    * [HIVE](#hive)
    * [MOCK](#mock-exchange)


# Action Statements

## CREATE EXCHANGE Statement
```
CREATE EXCHANGE [Name] TYPE [ExchangeType]
    URI [API CALLBACK URI]
    [...Exchange type-specific PARAMS]
```

### Examples
```
CREATE EXCHANGE 'IB' TYPE IB_API
    URI 'https://127.0.0.1:11590/'
```

## CREATE SPREAD Statement
This is a shortcut function to create a buy/sell order pairs with hedge triggers
```
TODO
```

### Examples
```
CREATE SPREAD OF 10 BTC FOR QQQToken FROM "CryptoExchange"
    HEDGE BTC FOR USD FROM "CryptoExchange"
    HEDGE QQQToken FOR QQQ FROM "StockExchange"
```

## UPDATE TRIGGER
```
TODO
```


## SELL Statement
```
[SELL] [Amounts] OF [FinancialInstrument]
    FOR [Amount]
    FROM [Exchange]
    WITH LIMIT OF [Amounts]
AND
[Other Action Statements]
    FOR EVERY
        [Amounts] OF [FinancialInstrument] [SOLD]
            FROM [Exchange]/ANYWHERE
        AND/OR
        [Amounts] OF [FinancialInstrument] [BOUGHT]
            FROM [Exchange]/ANYWHERE
AS 'ACTION_NAME'
```

### Examples

#### Simple Sell

The following statements are identical
```
SELL 1 SHARES OF QQQ FROM "MyBrokerAccount"
SELL 1 UNIT OF QQQ FROM "MyBrokerAccount"
SELL 1 QQQ FROM "MyBrokerAccount"
```

#### Sell Trigger
```
SELL 1 SHARES OF QQQ
  FOR 10 USD
  FROM "MyBrokerAccount"
  WITH LIMIT OF 100 SHARES
  FOR EVERY
    2 SHARES OF QQQ_TOKEN SOLD
        FROM "CoinBase"
AS 'My Hedge Trigger'
```

## BUY Statement
```
[BUY] [Amounts] OF [FinancialInstrument]
    FOR [Amount]
    FROM [Exchange]
    WITH LIMIT OF [Amounts]
AND
[Other Action Statements]
    FOR EVERY
        [Amounts] OF [FinancialInstrument] [SOLD]
            FROM [Exchange]/ANYWHERE
        AND/OR
        [Amounts] OF [FinancialInstrument] [BOUGHT]
            FROM [Exchange]/ANYWHERE
```

### Examples
```
BUY 1 SHARES OF BTC_ETF
  FOR 10 USD
  FROM "MyBrokerAccount"
  WITH LIMIT OF PURCHASING_POWER( "MyBrokerAccount", "QQQ" )
  FOR EVERY
    1 BTC OF USD_BTC SOLD
        FROM "CoinBase"
```

# functions

## PURCHASING_POWER

`PURCHASING_POWER( Exchange, FinancialInstrument )`

Returns the maximum [Amounts] of [FinancialInstrument] can purchase from [Exchange]

## CURRENT_PRICE

`CURRENT_PRICE( Exchange, FinancialInstrument )`

Returns the current price of a financial instrument from exchange

# Examples

## Creating a spread

* Max position: $1000
* Spread: $10
* QQQ etf price(Qetf): $100

| Bid             | Ask            |
|-----------------|----------------|
| 10shares@$95    | 10shares@$105  |
| ($1000 of Qetf) | ($800 of Qetf) |

If a trader hit ur ASK by bidding 2 shares of QQQ token

| Bid             | Ask            |
|-----------------|----------------|
| 10shares@$95    | 8shares@$105   |
| ($1000 of Qetf) | ($800 of Qetf) |

If another trader hit ur ASK with a 20 shares of bid, then only 8 shares of his order can be filled. 
* No need to handle his remaining 12 shares , its not ur responsibility, its his "broker/app/program" to deal with unfilled order.

| Bid             | Ask            |
|-----------------|----------------|
| 10shares@$95    |                |
| ($1000 of Qetf) |                |


### SELL Order
```
SELL 10 SHARES OF "QQQ_TOKEN"
    FOR CURRENT_PRICE( "CryptoExchange", "QQQ_TOKEN" ) + 5 BTC
    WITH LIMIT OF 1000 BTC
    FROM "CryptoExchange"
```


### BUY Order
```
BUY 10 SHARES OF "QQQ_TOKEN"
    FOR CURRENT_PRICE( "CryptoExchange", "QQQ_TOKEN" ) - 5 BTC
    WITH LIMIT OF 1000 BTC
    FROM "CryptoExchange"
```

## Hedging

### BUY Trigger for every QQQToken handed out
```
BUY 1 SHARES OF "QQQ"
    FOR CURRENT_PRICE( "StockExchange", "QQQ" )
    FROM "StockExchange"
    FOR EVERY 1 SHARES OF "QQQ_TOKEN" SOLD FROM "CryptoExchange"
```

### SELL Trigger for every QQQToken received
```
SELL 1 SHARES OF "QQQ"
    FOR CURRENT_PRICE( "StockExchange", "QQQ" )
    FROM "StockeExchange"
    FOR EVERY 1 SHARES OF "QQQ_TOKEN" BOUGHT FROM "CryptoExchange"
```

### BUY Trigger for every BTC handed out
```
BUY 1 BTC OF BTC
    FOR CURRENT_PRICE( "CryptoExchange", "USD.BTC" )
    FROM "CryptoExchange"
    FOR EVERY 1 BTC OF BTC SOLD FROM "CryptoExchange"
```

### SELL Trigger for every BTC received
```
SELL 1 BTC OF BTC
    FOR CURRENT_PRICE( "CryptoExchange", "USD.BTC" )
    FROM "CryptoExchange"
    FOR EVERY 1 BTC OF BTC BOUGHT FROM "CryptoExchange"
```

# Types of Exchange

## Mock Exchange
The mock exchange is an exchange for testing purpose