diff --git a/src/#main.rs# b/src/#main.rs#
new file mode 100644
index 0000000..156391e
--- /dev/null
+++ b/src/#main.rs#
@@ -0,0 +1,453 @@
+//
+// When inserting a new Order into the royalties tree, we must make sure the existing
+// royalties don't get shared with that new node. To do this, we must "shave" down
+// the tree, pushing royalties from the root down to all nodes to the left of the
+// new node.
+//
+// Case to think about:
+//   Selling 140000 USD to buy 2 BTC. Weight is ===140k USD
+//   Selling  50000 GBP to buy 1 BTC. Weight is === 50k GBP 
+//
+#![allow(unsafe_code)]
+#![allow(unused_variables)]
+#![allow(dead_code)]
+use std::env;
+use std::collections::HashMap;
+use std::cmp::Ordering;
+use std::rc::Rc;
+use std::cell::RefCell;
+use rand::prelude::*;
+use rand::rngs::StdRng;
+use finum::FiNum;
+
+#[derive(Debug, Clone)]
+struct Trader {
+    name: String,
+    id: usize,    
+    balances: HashMap<usize,FiNum>, // Maps Currency to Amount
+    }
+
+impl Trader {
+    fn new(name:&str,id:usize) -> Self {
+        Trader {
+            name: String::from(name),
+            id: id,
+            balances: HashMap::new()
+            }
+        }
+    fn add_balance(&mut self, cur:usize, delta:FiNum) {
+        self.balances.entry(cur).and_modify(|ent| *ent+=delta ).or_insert_with(|| delta);
+        }
+    fn sub_balance(&mut self, cur:usize, delta:FiNum) {
+        self.balances.entry(cur).and_modify(|ent| *ent-=delta );
+        }
+    fn get_balance(&self, cur:usize) -> FiNum {
+        *self.balances.get(&cur).map(|bal| bal).unwrap_or(&FiNum::new(0u64))
+        }
+    }
+
+#[derive(Debug, Clone)]
+struct Order {
+    sell_qty: FiNum,
+    sell_remain: FiNum,
+    buy_qty: FiNum,
+    owner: usize,
+    rt_loc: usize,      // Location in the Royalty Tree
+    }
+
+struct RoyaltyTree {
+    tree: Vec<Royalty>,
+    }
+
+impl RoyaltyTree {
+    fn new() -> Self {
+        RoyaltyTree { tree:Vec::new() }
+	}
+    fn get_weight(&self, index:usize) -> FiNum {
+        println!("Get_weight {} self.tree.len() {} ",index,self.tree.len());
+        if index<self.tree.len() { self.tree[index].weight }
+	else {
+	    let ff=wt_forefather(index);
+	    let mut index=index;
+	    while index!=ff {
+	        if index<self.tree.len() { return self.tree[index].weight }
+		else { index=wt_parent(index) }
+		}
+	    while index>=self.tree.len() { index=wt_left(index).unwrap() }
+	    self.tree[index].weight
+	    }
+	}
+    }
+
+struct Royalty {
+    weight: FiNum,      // Here and below
+    acc: FiNum,         // Here and Below
+    }
+
+impl Royalty {
+    fn new(weight: FiNum) -> Self {
+        Royalty { weight:weight, acc:FiNum::new(0u64) }
+        }
+    }
+
+impl RoyaltyTree {
+    fn insert(&mut self, weight: FiNum) -> usize {
+        let last=self.tree.len();
+	let mut nweight=weight;
+	if let Some(left )=wt_left (last) { if left <self.tree.len() { nweight+=self.tree[left ].weight } }
+	if let Some(right)=wt_right(last) { if right<self.tree.len() { nweight+=self.tree[right].weight } }
+        self.tree.push(Royalty::new(nweight));
+        let forefather=wt_forefather(last);
+        let mut pivot=last;
+        while pivot!=forefather {
+            pivot=wt_parent(pivot);
+	    if pivot<self.tree.len() { self.tree[pivot].weight+=weight }
+            }
+	last
+        }
+    fn add(&mut self, index:usize, weight: FiNum) {
+        let ff=wt_forefather(index);
+	
+    fn dump(&self) {
+        for index in 0..self.tree.len() {
+	    println!("Index {} Weight {}",index,self.tree[index].weight);
+	    }
+	}
+    }
+        
+
+trait Dumpable {
+    fn dump(&self);
+    }
+
+impl Dumpable for usize {
+    fn dump(&self) {
+        println!("Dump Integer: {}",self);
+        }
+    }
+
+
+impl Dumpable for Rc<RefCell<Order>> {
+    fn dump(&self) {
+        }
+    }
+
+
+impl Dumpable for Order {
+    fn dump(&self) {
+        println!("Giving {}/{} to get {}",self.sell_remain,self.sell_qty,self.buy_qty);
+        }
+    }
+
+
+
+struct Market {
+    asset_name2num: HashMap<String,usize>,
+    asset_num2name: HashMap<usize,String>,
+    asset_count:usize,
+    money_supply: HashMap<usize,FiNum>,
+    traders: Vec<Trader>,
+    trader_name2num: HashMap<String,usize>,
+    orders: HashMap<(usize,usize),PQueue<Rc<RefCell<Order>>>>,
+    royalties: HashMap<usize,RoyaltyTree>, // Active orders that are accepting asset X. They receive royalties when someone makes an order to sell X
+    }
+
+impl Market {
+    fn new() -> Self {
+        let mut rval=Market {
+            asset_name2num: HashMap::new(),
+            asset_num2name: HashMap::new(),
+            asset_count:0,
+            money_supply: HashMap::new(),
+            orders: HashMap::new(),
+            royalties: HashMap::new(),
+            traders: Vec::new(),
+            trader_name2num: HashMap::new(),
+            };
+	rval.register_trader("*NONE*");
+	rval
+        }
+    fn distribute_royalty(&self, amount:FiNum) {
+        
+        }
+    fn sanity_check(&self) {
+        println!("Sanity Checking Market...");
+        for (cur,amt) in self.money_supply.iter() {
+            println!("Money Supply {}: {}",self.number_to_name(*cur),*amt);
+            let mut acc_orders=FiNum::new(0);
+            for (ac,pq) in &self.orders { if ac.0==*cur {
+                for off in &*pq.v { acc_orders+=off.borrow().sell_remain; }
+                } }
+            let mut acc_traders=FiNum::new(0);
+            for t in &self.traders { acc_traders+=t.get_balance(*cur); }
+            let acc=acc_orders+acc_traders;
+            println!("    {}: Orders {} Traders {} Total {} Should Be {}",self.number_to_name(*cur),acc_orders,acc_traders,acc,*amt);
+            }
+        }
+    fn register_trader(&mut self, name:&str) -> usize { // Add error checking for inserting a trader twice
+        let rval=self.traders.len();
+        self.trader_name2num.insert(String::from(name),self.traders.len());
+        self.traders.push(Trader::new(name,rval));
+        rval
+        }
+    // These are the only ways to get money into or out of the market.
+    fn add_trader_balance(&mut self, who:usize, cur:usize, delta: FiNum) {
+        self.traders[who as usize].add_balance(cur,delta);
+        *self.money_supply.get_mut(&cur).unwrap()+=delta;
+        }
+    fn sub_trader_balance(&mut self, who:usize, cur:usize, delta: FiNum) {
+        self.traders[who as usize].sub_balance(cur,delta);
+        *self.money_supply.get_mut(&cur).unwrap()-=delta;
+        }
+    fn register_asset(&mut self, name:&str) -> usize {
+        self.asset_count+=1;
+        self.asset_name2num.insert(String::from(name),self.asset_count);
+        self.asset_num2name.insert(self.asset_count,String::from(name));
+        self.money_supply.insert(self.asset_count,FiNum::new(0));
+        self.asset_count
+        }
+    fn name_to_number(&self, name:&str) -> usize {
+        *self.asset_name2num.get(name).unwrap()
+        }
+    fn number_to_name(&self, num:usize) -> &str {
+        &*self.asset_num2name.get(&num).unwrap()
+        }
+    fn dump(&self) {
+        println!("Dumping Market:");
+        for t in &self.traders {
+            println!("    Trader {}: {}",t.id,t.name);
+            for (cur,bal) in t.balances.iter() {
+                println!("        {}: {}",self.number_to_name(*cur),*bal)
+                }
+            }
+        for (ap,pq) in &self.orders {
+            println!("Orders selling {} to buy {}:",self.number_to_name(ap.0),self.number_to_name(ap.1));
+            let mut sorted=pq.v.clone();
+            sorted.sort_by(|a,b| { let a=a.borrow(); let b=b.borrow(); (a.sell_qty/a.buy_qty).cmp(&(b.sell_qty/b.buy_qty)) });
+            for off in sorted.iter() {
+                let off=off.borrow();
+                println!("    {} @ {} ({})",
+                         off.sell_remain,              // off.buy_qty*off.sell_remain/off.sell_qty,
+                         off.buy_qty/off.sell_qty,
+                         self.traders[off.owner as usize].name);
+                }
+            pq.dump();
+            }
+        }
+    fn make_order(&mut self, owner:usize, sell_type:usize, buy_type:usize, sell_qty_initial:FiNum, buy_qty_initial:FiNum) -> bool // Dollars, Bitcoin, 64000, 1
+        {
+        let initial_balance=self.traders[owner as usize].get_balance(sell_type);
+        if initial_balance<sell_qty_initial { return false; }
+        let mut buy_qty=buy_qty_initial;
+        let ap=(buy_type,sell_type);
+        while buy_qty>FiNum::new(0) && self.orders.contains_key(&ap) && self.orders.get(&ap).unwrap().v.len()>0 {
+            let mut elt=(*(self.orders.get(&ap).unwrap().v[0].borrow())).clone();
+            if sell_qty_initial/buy_qty_initial>=elt.buy_qty/elt.sell_qty { // Transact at ask_rate
+                let qty=std::cmp::min(elt.sell_remain,buy_qty);
+                elt.sell_remain-=qty;
+                buy_qty-=qty;
+                let pay_qty=qty*elt.buy_qty/elt.sell_qty; // 1.8499*194623/2.9744
+                self.traders[owner     as usize].sub_balance(sell_type,pay_qty);
+                self.traders[owner     as usize].add_balance(buy_type ,qty); 
+                self.traders[elt.owner as usize].add_balance(sell_type,pay_qty);
+                if elt.sell_remain==0.into() { self.orders.get_mut(&ap).unwrap().pop(); }
+                else { self.orders.get(&ap).unwrap().v[0].borrow_mut().sell_remain-=qty; }
+            } else { break; }
+            }
+        if buy_qty>0.into() {
+            let ap=(sell_type,buy_type);
+            if let None=self.orders.get_mut(&ap) { self.orders.insert(ap,PQueue::new()); }
+            let bids=self.orders.get_mut(&ap).unwrap();
+            let sell_qty_remain=sell_qty_initial*buy_qty/buy_qty_initial;
+            if sell_qty_remain>0.into() {
+	        let rt_loc=self.royalties.entry(sell_type).or_insert(RoyaltyTree::new()).insert(sell_qty_remain);
+                let neworder=Rc::new(RefCell::new(
+		    Order { owner:owner, sell_qty:sell_qty_remain, sell_remain:sell_qty_remain, buy_qty:buy_qty, rt_loc: rt_loc } ));
+                bids.insert(neworder);
+                self.traders[owner as usize].sub_balance(sell_type,sell_qty_remain);
+                }
+            }
+        true
+        }
+    }
+
+impl PartialOrd for Order {  
+    fn partial_cmp(&self, other:&Self) -> Option<Ordering> {
+        let ord0=self .sell_qty/self .buy_qty;
+        let ord1=other.sell_qty/other.buy_qty;
+        if      ord0<ord1 { Some(Ordering::Less) }
+        else if ord0>ord1 { Some(Ordering::Greater) }
+        else              { Some(Ordering::Equal) }
+        }
+    }
+
+impl PartialEq for Order {
+    fn eq(&self, other:&Self) -> bool {
+        let ord0=self .sell_qty/self .buy_qty;
+        let ord1=other.sell_qty/other.buy_qty;
+        ord0==ord1
+        }
+    }
+
+
+struct PQueue<T: Dumpable> {
+  v: Vec<T>,
+  }
+
+impl<T: Dumpable + std::cmp::PartialOrd + std::fmt::Debug> PQueue<T> {
+    fn new()->Self {
+        PQueue {
+            v: Vec::new()
+            }
+        }
+    fn peek(&self) -> &T {
+        &self.v[0]
+        }
+    fn bubble_up(&mut self, pos: usize) {
+        if pos>0 {
+            let parent=(pos-1)/2;
+            if self.v[parent]<self.v[pos] {
+                self.v.swap(parent,pos);
+                self.bubble_up(parent);
+                }
+            }
+        }
+    fn trickle_down(&mut self, pos: usize) {
+        let mut pivot=pos;
+        let child0=pos*2+1;
+        let child1=pos*2+2;
+        if child0<self.v.len() {
+            if self.v[pos]<self.v[child0] { pivot=child0; }
+            if child1<self.v.len() {
+                if self.v[pivot]<self.v[child1] { pivot=child1; }
+                }
+            if pivot!=pos {
+                self.v.swap(pivot,pos);
+                self.trickle_down(pivot);
+                }
+            }
+        }
+    fn insert(&mut self, item: T) {
+        self.v.push(item);
+        self.bubble_up(self.v.len()-1);
+        }
+    fn pop(&mut self) -> Option<T> {
+        if self.v.len()==0 { None }
+        else {
+            let end=self.v.len()-1;
+            self.v.swap(0,end);
+            let rval=self.v.pop();
+            self.trickle_down(0);
+            rval
+            }
+        }
+    fn dump(&self) {
+        for index in 0..self.v.len() {
+            self.v[index].dump();
+            }
+        }
+    }
+
+impl Market {
+    fn exercise(&mut self) {
+        let mut rng: StdRng=StdRng::seed_from_u64(13u64);
+        let teppy=self.register_trader("Teppy");  
+        let luni =self.register_trader("Luni");
+        let usd  =self.register_asset("USD");
+        let btc  =self.register_asset("BTC");
+        self.add_trader_balance(teppy,btc,100000.into());
+        self.add_trader_balance(luni ,usd,650000000.into());
+        let mut count=0;
+        let mut tries=0;
+        for _i in 1..=1000000 {
+            let seller=if rng.gen_bool(0.5) { teppy } else { luni };
+            let (buy_type,sell_type,buy_qty,sell_qty):(usize,usize,FiNum,FiNum);
+            if rng.gen_bool(0.5) {
+                sell_type=btc;
+                buy_type=usd;
+                sell_qty=rng.gen_range(1..=5).into();
+                buy_qty=sell_qty*rng.gen_range(60..=70).into();
+            } else {
+                sell_type=usd;
+                buy_type=btc;
+                buy_qty=rng.gen_range(1..=5).into();
+                sell_qty=buy_qty*rng.gen_range(60..=70).into();
+                }
+            let mut _success=false;
+            if self.make_order(seller,sell_type,buy_type,sell_qty,buy_qty) { count+=1; _success=true; };
+            if count>=1000000 { break; }
+            tries+=1;
+            }
+        println!("Tries: {} Trades: {}",tries,count);
+        self.sanity_check();
+        }
+    }
+
+fn wt_level(index:usize) -> usize {
+    (index^(index+1)).trailing_ones() as usize-1
+    }
+
+fn wt_leaf(index:usize) -> bool {
+    index&1==0
+    }
+
+fn wt_left(index:usize) -> Option<usize> {
+    let level=wt_level(index);
+    if level>0 { Some(index-(1<<(wt_level(index)-1))) } else { None }
+    }
+
+fn wt_right(index:usize) -> Option<usize> {
+    let level=wt_level(index);
+    if level>0 { Some(index+(1<<(wt_level(index)-1))) } else { None }
+    }
+
+fn wt_parent(index:usize) -> usize {
+    let lev=wt_level(index);
+    let first_in_row=index%(1<<lev);
+    let skip=2<<lev;
+    let nth_in_row=(index-first_in_row)/skip;
+    let first_in_parent_row=(2<<lev)-1;
+    let skip_in_parent_row=4<<lev;
+    let nth_in_parent_row=nth_in_row>>1;
+    first_in_parent_row+nth_in_parent_row*skip_in_parent_row
+    }
+
+fn wt_forefather(max_index:usize) -> usize {
+    let mut rval=max_index;
+    rval=rval|(rval>>1);
+    rval=rval|(rval>>2);
+    rval=rval|(rval>>4);
+    rval=rval|(rval>>8);
+    rval=rval|(rval>>16);
+    rval=rval|(rval>>32);
+    if rval>max_index { wt_left(rval).unwrap() } else { rval }
+    }
+
+fn tree_stuff() {
+    for i in (0..=60).step_by(1) {
+        println!("Index {} Forefather {} Parent {}",i,wt_forefather(i),wt_parent(i));
+        }
+    }
+
+fn royalty_stuff() {
+    let mut rt=RoyaltyTree::new();
+    for _ in 0..20 {
+        rt.insert(FiNum::new_i32(10));
+	}
+    for index in 0..rt.tree.len() {
+        println!("Index: {} Royalty: {}",index,rt.tree[index].weight);
+        }
+    }
+
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let mode=if args.len()<=1 { "--exercise" } else { args[1].as_str() };
+    let mut m=Market::new(); // USD type is 1, EUR type is 2, BTC type is 10, ETH type is 11, zKN6FBdD SOL type is 12
+    match mode {
+        "--exercise" => m.exercise(),
+        "--treestuff" => tree_stuff(),
+	"--royaltystuff" => royalty_stuff(),
+        _ => println!("Unknown mode: {}",mode),
+        }
+    }
diff --git a/src/.#main.rs b/src/.#main.rs
new file mode 100644
index 0000000..07129e7
--- /dev/null
+++ b/src/.#main.rs
@@ -0,0 +1 @@
+teppy@HAWAII.19788:1716742567
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 6131124..5ca9494 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -52,7 +52,7 @@ struct Order {
     sell_remain: FiNum,
     buy_qty: FiNum,
     owner: usize,
-    rt_loc: usize,        // Location in the Royalty Tree
+    rt_loc: usize,      // Location in the Royalty Tree
     }
 
 struct RoyaltyTree {
@@ -61,8 +61,22 @@ struct RoyaltyTree {
 
 impl RoyaltyTree {
     fn new() -> Self {
-         RoyaltyTree { tree:Vec::new() }
-	 }
+        RoyaltyTree { tree:Vec::new() }
+	}
+    fn get_weight(&self, index:usize) -> FiNum {
+        println!("Get_weight {} self.tree.len() {} ",index,self.tree.len());
+        if index<self.tree.len() { self.tree[index].weight }
+	else {
+	    let ff=wt_forefather(index);
+	    let mut index=index;
+	    while index!=ff {
+	        if index<self.tree.len() { return self.tree[index].weight }
+		else { index=wt_parent(index) }
+		}
+	    while index>=self.tree.len() { index=wt_left(index).unwrap() }
+	    self.tree[index].weight
+	    }
+	}
     }
 
 struct Royalty {
@@ -78,21 +92,24 @@ impl Royalty {
 
 impl RoyaltyTree {
     fn insert(&mut self, weight: FiNum) -> usize {
-        self.tree.push(Royalty::new(weight));
-        let last=self.tree.len()-1;
+        let last=self.tree.len();
+	let mut nweight=weight;
+	if let Some(left )=wt_left (last) { if left <self.tree.len() { nweight+=self.tree[left ].weight } }
+	if let Some(right)=wt_right(last) { if right<self.tree.len() { nweight+=self.tree[right].weight } }
+        self.tree.push(Royalty::new(nweight));
         let forefather=wt_forefather(last);
         let mut pivot=last;
         while pivot!=forefather {
             pivot=wt_parent(pivot);
-	    for i in self.tree.len()-1..=pivot {
-	        self.tree.push(Royalty::new(0.into()));
-		self.tree[i].weight=if let Some(v)=wt_left (i) { self.tree[v].weight } else { FiNum::zero() }
-		                   +if let Some(v)=wt_right(i) { self.tree[v].weight } else { FiNum::zero() };
-	        }
+	    if pivot<self.tree.len() { self.tree[pivot].weight+=weight }
             }
-        self.tree[last].weight+=weight;
 	last
         }
+    fn dump(&self) {
+        for index in 0..self.tree.len() {
+	    println!("Index {} Weight {}",index,self.tree[index].weight);
+	    }
+	}
     }
         
 
@@ -339,7 +356,7 @@ impl Market {
         self.add_trader_balance(luni ,usd,650000000.into());
         let mut count=0;
         let mut tries=0;
-        for _i in 1..=10000000 {
+        for _i in 1..=1000000 {
             let seller=if rng.gen_bool(0.5) { teppy } else { luni };
             let (buy_type,sell_type,buy_qty,sell_qty):(usize,usize,FiNum,FiNum);
             if rng.gen_bool(0.5) {
@@ -367,6 +384,10 @@ fn wt_level(index:usize) -> usize {
     (index^(index+1)).trailing_ones() as usize-1
     }
 
+fn wt_leaf(index:usize) -> bool {
+    index&1==0
+    }
+
 fn wt_left(index:usize) -> Option<usize> {
     let level=wt_level(index);
     if level>0 { Some(index-(1<<(wt_level(index)-1))) } else { None }
@@ -405,6 +426,16 @@ fn tree_stuff() {
         }
     }
 
+fn royalty_stuff() {
+    let mut rt=RoyaltyTree::new();
+    for _ in 0..20 {
+        rt.insert(FiNum::new_i32(10));
+	}
+    for index in 0..rt.tree.len() {
+        println!("Index: {} Royalty: {}",index,rt.tree[index].weight);
+        }
+    }
+
 
 fn main() {
     let args: Vec<String> = env::args().collect();
@@ -413,6 +444,7 @@ fn main() {
     match mode {
         "--exercise" => m.exercise(),
         "--treestuff" => tree_stuff(),
+	"--royaltystuff" => royalty_stuff(),
         _ => println!("Unknown mode: {}",mode),
         }
     }