Fix order serialization

src/engine/engine/execution.rs

@@ -1,7 +1,8 @@
 use hypersdk::{
     Decimal,
     hypercore::{
-        self, BatchOrder, OrderRequest, OrderResponseStatus, OrderTypePlacement, Side, TimeInForce,
+        self, BatchOrder, NonceHandler, OrderRequest, OrderResponseStatus, OrderTypePlacement,
+        Side, TimeInForce,
     },
 };
 use pulse_sdk::prelude::*;
@@ -83,10 +84,10 @@ impl Engine {
             builder: None,
         };
 
-        let nonce = chrono::Utc::now().timestamp_millis() as u64;
+        let nonce = NonceHandler::default();
 
         match client
-            .place(&acc.private_key.0, order, nonce, None, None)
+            .place(&acc.private_key.0, order, nonce.next(), None, None)
             .await
         {
             // Invalid order

src/engine/engine/risk.rs

@@ -159,7 +159,7 @@ impl RiskEngine {
             take_profit: Cloid::random(),
             stop_loss: Cloid::random(),
             risk_equity: risk,
-            size: risk / (signal.entry_price - signal.stop_loss).abs(),
+            size: (risk / (signal.entry_price - signal.stop_loss).abs()).round_dp(3),
         })
     }